Daily map of the actual sea surface temperature (JPL MUR, about 1 km), in °C.
Map layers
The raw sea surface temperature, not the anomaly. The tropics are always warm, so this map shows where the water is hot, not where it is unusual. Use the anomaly layer to see El Nino.
How to read it
Colour scale from purple/blue (cold) to red/white (hot). Around Samui, water above about 30 °C for weeks stresses corals.