Moderate Storm Surge ● Closed
High waves and swell — south-western coasts of Madagascar.
Loading live data… · Marker positions are approximate; severity is labelled in each popup. Sources: USGS, GDACS, NASA EONET, NOAA/NWS, EMSC.
Rough seas will affect the coastal navigation zone between cap Ste Marie and Beheloka/Toliara II due to a south-easterly swell. Significant wave heights will be around 3-3.5 m.
Measurements
| Coordinates | -25.2179, 43.9779 |
|---|---|
| Region | south-western coasts of Madagascar. |
| Location Precision | polygon |
| Issuing Authority | Madagascar — mg-meteo-en |
| Cap Urgency | Expected |
| Cap Certainty | Possible |
| Cap Expires | 2026-09-21T06:00:00+03:00 |
Official source
Warnings courtesy of the issuing national meteorological service, via the WMO Alert Hub.
This is an official warning issued by the authority named above. Follow its instructions and those of your local emergency services.
Severity as published by WMO Alert Hub (national weather services).
View original reportThis event as JSON · API and licence
Source updated 31 days ago (Sep 18, 2026 14:22 UTC) · we last heard from WMO Alert Hub (national weather services) 52 seconds ago
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Official authorities in Madagascar
If you are there, these are the bodies whose instructions apply. This site is not an emergency service and does not issue warnings.
More for Madagascar →What to do
Follow the instructions issued by WMO Alert Hub (national weather services) and your local emergency services. The guidance below is background.
Understanding surge zones, evacuation timing, and why storm surge is the deadliest part of a tropical cyclone.
Open Storm Surge Safety Guide →Nearby & related events
Disclaimer: figures are automatic feeds from the named agencies and may be revised. Do not use this page for life-safety decisions — follow official local emergency services.