In September warmest sea in Sumatra is usually observed in the following locations: Penang, Batu Feringgi, George Town.
Table below shows the average sea water temperature for marine resorts of Sumatra in September for the last three years.
| Place name | September 2026 | September 2025 | September 2024 |
|---|---|---|---|
| Penang | 87.3°F | 86.3°F | 85.6°F |
| Batu Feringgi | 87.3°F | 86.3°F | 85.6°F |
| George Town | 87.1°F | 86.2°F | 85.4°F |
| Pangkor | 87.0°F | 86.0°F | 85.9°F |
| Medan | 86.9°F | 85.6°F | 85.3°F |
| Kuala Lumpur | 86.8°F | 85.8°F | 86.0°F |
| Malacca | 86.6°F | 85.7°F | 85.9°F |
| Perhentian Islands | 86.4°F | 85.9°F | 86.0°F |
| Sentosa | 86.0°F | 84.9°F | 85.9°F |
| Redang | 86.0°F | 85.8°F | 85.6°F |
| Singapore | 85.9°F | 84.8°F | 85.6°F |
| Johor Bahrul | 85.7°F | 84.7°F | 85.2°F |
| Batam | 85.5°F | 84.8°F | 85.6°F |
| Bintan | 85.5°F | 84.9°F | 85.4°F |
| Kuala Terengganu | 85.2°F | 85.5°F | 85.2°F |
| Tioman | 84.1°F | 84.2°F | 84.5°F |
Charts below show average sea water temperature for Sumatra resorts with the warmest sea in September.
You can also check other months of the year to see sea temperature of Sumatra resorts at that time.
Popular places:
Name
°F
