Southwest Indian Ocean Tropical Weather Update – November 5, 2026

By Paul Harrison | Orbis Weather

Coverage: Madagascar, Mauritius, Réunion, Seychelles, Mayotte, Comoros, Mozambique and the surrounding Southwest Indian Ocean.

Published: Thursday, November 5, 2026 (regional local date)

Latest official cyclone bulletin reviewed: Météo-France La Réunion, November 4, 2026, at 4:21 p.m. Réunion time.

🌀 Tropical Outlook: Disturbance Northeast of Agalega Under Watch as Cyclone Season Approaches

The Southwest Indian Ocean is entering a period of increasing tropical weather activity as the 2026–2027 cyclone season approaches, with forecasters monitoring a developing area of disturbed weather northeast of Agalega.

According to the latest available bulletin from Météo-France’s Regional Specialized Meteorological Centre (RSMC) in La Réunion, no classified tropical depression or tropical cyclone was present in the basin at the time of the November 4 assessment.

However, forecasters identified an area of unsettled weather northeast of Agalega that is expected to move slowly southwestward over the coming days.

The probability of this disturbance developing into a tropical storm is considered moderate beginning Friday, November 6.

The system has not been confirmed as a named tropical storm, and its eventual intensity, track and potential impacts remain uncertain.

 

📊 Southwest Indian Ocean Tropical Status

🌧️ 1. Agalega Disturbance: Main Area to Watch

The most significant tropical development concern is an area of disturbed weather northeast of Agalega, a group of islands north of Mauritius.

Météo-France expects the disturbance to drift southwestward, with environmental conditions potentially allowing greater organization later in the week.

During the next several days, forecasters will monitor whether thunderstorms become more concentrated around a developing low-pressure center.

Important indicators include:

• Thunderstorm organization: Whether persistent convection develops around a circulation center.

• Atmospheric wind shear: Strong upper-level winds can disrupt developing tropical systems.

• Ocean temperatures: Warm water can provide energy for tropical development.

• Low-level circulation: A better-defined center would indicate increasing organization.

• Forecast consistency: Agreement among successive model runs would improve confidence in the predicted track and intensity.

A moderate formation risk does not mean a tropical storm is certain to develop. It also does not establish that Mauritius, Réunion, Madagascar or any other island will experience cyclone conditions.

Residents and maritime operators around Agalega and the northern Mascarene region should follow subsequent official bulletins.

 

🌍 2. Regional Tropical Weather Outlook

🇲🇬 Madagascar

Madagascar remains one of the most cyclone-exposed countries in the Southwest Indian Ocean, particularly along its eastern and northeastern coastline.

The developing disturbance northeast of Agalega does not currently provide sufficient evidence to predict a Madagascar landfall.

As the tropical season progresses, eastern Madagascar should remain attentive to the possibility of heavy rainfall, flooding, damaging winds and coastal waves associated with future systems.

Areas requiring particular seasonal preparedness include Antsiranana, Toamasina, Île Sainte-Marie and other communities along the eastern coast.

🇲🇺 Mauritius

Mauritius should closely monitor the evolving weather pattern northeast of Agalega.

Although the disturbance is located within the broader northern Mascarene region, there is not yet sufficient confidence to identify a direct threat to the main island of Mauritius.

The coming days will be important for establishing whether the system develops a defined circulation and whether its southwestward movement continues.

Marine interests should pay particular attention to updated forecasts for offshore winds, thunderstorms and sea conditions.

🇷🇪 Réunion

Réunion is entering the cyclone preparedness period with no classified tropical system identified in the latest official basin bulletin.

For Thursday, November 5, Météo-France forecasts a largely sunny start, followed by developing clouds and some afternoon showers, especially in western and interior areas.

Eastern winds may produce gusts of approximately 40–50 km/h (25–31 mph) around Saint-Denis and 50–60 km/h (31–37 mph) along the southern exposed coastline.

Coastal temperatures are forecast to reach approximately 28–30°C (82–86°F).

These conditions represent the local weather forecast and are not evidence of direct effects from the Agalega disturbance.

 

🇸🇨 Seychelles

The Seychelles remain an important area for tropical rainfall and thunderstorm monitoring.

The first named storm of the 2026–2027 Southwest Indian Ocean season, Agueda, previously brought unsettled conditions to the main Seychelles islands, including thunderstorms, heavy showers and gusty winds.

 

The Agalega disturbance should be monitored separately from that earlier event.

Localized thunderstorms and heavy rainfall can occur even when no tropical cyclone is present.

🇾🇹 Mayotte and 🇰🇲 Comoros

Mayotte and the Comoros are approaching a period when tropical disturbances can increasingly influence rainfall, winds and maritime conditions.

Residents should remain alert to future heavy rainfall and flash-flood potential, particularly in steep terrain and poorly drained urban areas.

Current information does not establish a direct cyclone threat from the monitored Agalega disturbance to either Mayotte or the Comoros.

🇲🇿 Mozambique

Mozambique’s coastline faces seasonal tropical cyclone exposure, particularly during the wetter months.

The northern and central coastal provinces should review flood preparedness, emergency communications and maritime safety procedures.

There is currently insufficient evidence to forecast a Mozambique landfall from the disturbance northeast of Agalega.

📅 3. Five-Day Tropical Development Outlook: November 5–9

Forecast confidence: Moderate that the disturbance warrants monitoring; low regarding eventual intensity, precise track and possible land impacts.

This outlook is an interpretation of the latest available official five-day assessment, not a claim that a storm will form on any particular date.

📉 4. 2026–2027 Cyclone Season Forecast: Below-Normal Activity Expected

Météo-France has issued its seasonal outlook for the Southwest Indian Ocean, suggesting the coming cyclone season may experience below-normal activity.

The outlook suggests approximately 6–10 tropical storms or cyclonic systems, of which 3–5 could reach tropical cyclone intensity.

Météo-France estimates a 70% probability of below-normal seasonal activity, compared with a 20% probability of near-normal activity and a 10% probability of above-normal activity.

 

However, a quieter season does not necessarily mean a safer season.

A single intense cyclone making landfall near a populated coastline can cause extensive damage, regardless of the total number of storms that develop across the basin.

🌡️ 5. El Niño and Changing Cyclone Tracks

One important consideration for the 2026–2027 season is the influence of El Niño and changes in Indian Ocean temperature patterns.

Météo-France representatives have indicated that these factors could affect preferred cyclone tracks, potentially favoring more north-to-south movement rather than the more familiar westward trajectories.

This possibility is particularly relevant to Réunion, where altered storm tracks could influence exposure even during a season with fewer storms overall.

 

Nevertheless, seasonal forecasts cannot determine the path of individual cyclones months in advance.

Each developing tropical system must be evaluated using current atmospheric observations, satellite imagery and updated forecast models.

🌊 6. Marine and Coastal Hazards

Tropical weather hazards can develop well before a disturbance reaches tropical storm intensity.

Mariners, fishermen, shipping operators and coastal communities should monitor:

• 🌊 Rough seas and swell: Increasing wave heights can create dangerous conditions for smaller vessels.

• ⛈️ Thunderstorms: Squalls may bring sudden wind gusts, lightning and reduced visibility.

• 🌧️ Heavy rainfall: Intense showers can affect coastal communities and island drainage systems.

• 💨 Changing wind conditions: Winds may strengthen around developing low-pressure systems.

• 🚢 Marine navigation: Offshore routes may require adjustment if organized tropical development occurs.

No basin-wide marine warning or specific wave-height forecast should be inferred from this general hazard discussion. Local marine bulletins remain the authoritative source for operational decisions.

🛰️ 7. How Orbis Weather Monitors Tropical Development

Orbis Weather evaluates tropical weather using information published by recognized meteorological agencies and scientific monitoring services.

The principal regional authority is Météo-France La Réunion, which operates the Regional Specialized Meteorological Centre responsible for tropical cyclone monitoring in the Southwest Indian Ocean.

Additional information may be obtained from satellite observations, numerical weather prediction models and national meteorological services.

Forecast models are valuable tools, but their individual outputs should not be treated as official warnings.

In particular, a model showing a possible cyclone several days into the future does not establish that the cyclone will form or affect land.

Official meteorological agencies assess multiple data sources before issuing classifications, forecasts and warnings.

🚨 8. Tropical Cyclone Preparedness

Communities across Madagascar, Mauritius, Réunion, Mayotte, Comoros, Seychelles and Mozambique should use the early-season period to review basic preparedness measures.

Recommended actions include checking emergency supplies, securing loose outdoor items, identifying safe shelter locations and reviewing local evacuation procedures.

Coastal residents should understand the differences between damaging wind, flooding, storm surge and dangerous surf risks.

Those living near rivers, steep slopes or low-lying coastal areas may face significant hazards even when the center of a cyclone remains offshore.

Residents should follow instructions from their own national or territorial meteorological and emergency-management authorities.

❓ 9. Southwest Indian Ocean Tropical Weather FAQ

Is there an active tropical cyclone in the Southwest Indian Ocean?

No classified tropical depression or cyclone was reported in the latest reviewed Météo-France bulletin issued November 4, 2026. A new bulletin is needed to confirm conditions throughout November 5.

Could a new tropical storm form this week?

Yes. Météo-France identified moderate potential for a disturbance northeast of Agalega to develop into a tropical storm beginning Friday, November 6.

Is Mauritius or Réunion currently threatened?

The reviewed official bulletin does not establish a direct cyclone threat to either island. Residents should monitor subsequent forecasts because the disturbance’s future development and track remain uncertain.

When does the Southwest Indian Ocean cyclone season begin?

The main regional cyclone season generally runs from November through April, with the most active period usually occurring during the Southern Hemisphere summer. Tropical systems can occasionally develop outside the main season.

Will the 2026–2027 season be quieter than normal?

Météo-France currently favors below-normal activity, but this remains a seasonal probability forecast rather than a guarantee.

🔎 10. Official Tropical Weather Sources

The following agencies provide authoritative forecasts, warnings and meteorological information for the region.

Readers should consult these agencies directly for the latest advisories, particularly when tropical weather threatens populated areas or maritime operations.

📝 11. Editorial Methodology and Accuracy

This report has been prepared for Orbis Weather using the latest official tropical cyclone information available during editorial review.

The primary source is the Météo-France La Réunion tropical cyclone activity bulletin issued November 4, 2026, supplemented by regional seasonal forecast reporting.

The November 5 publication date reflects the local calendar date in the Southwest Indian Ocean. It does not imply that all observations or advisories were issued on November 5.

Orbis Weather distinguishes between observed weather conditions, official agency forecasts, seasonal predictions and general hazard preparedness information.

Forecast probabilities may change as new satellite observations and atmospheric data become available.

Where a storm’s intensity, position or expected impacts cannot be confirmed, Orbis Weather does not assign speculative wind speeds, coordinates, cyclone categories or landfall locations.

Material factual errors should be corrected when identified, with significant changes made clear to readers.

Orbis Weather is an independent weather information publisher and is not an official meteorological warning agency.

🌍 Southwest Indian Ocean Tropical Weather: Final Outlook

The Southwest Indian Ocean is approaching its principal cyclone season with one notable disturbance under observation northeast of Agalega.

Although Météo-France reported no classified tropical depression or cyclone in its November 4 bulletin, the potential for tropical storm development is considered moderate beginning November 6.

Meanwhile, the newly released 2026–2027 seasonal outlook favors below-normal activity across the basin. That forecast offers some encouragement, but it does not eliminate the possibility of a destructive cyclone affecting Madagascar, Mauritius, Réunion or neighboring countries.

The key development to monitor over the next 48–72 hours is whether the Agalega disturbance becomes sufficiently organized to be classified as a tropical system.

Orbis Weather will continue covering tropical developments across the Southwest Indian Ocean, including significant changes in storm formation potential, projected tracks, intensity and coastal hazards.

Paul Harrison

Orbis Weather — Global Weather, Tropical Cyclones & Natural Hazards

Sometimes unpredictable. Always worth watching.