All data are in degrees Fahrenheit

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Water temperature in São Tomé

Detailed information about the current water temperature in São Tomé. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.
Sea temperature in São Tomé now

78.6

°F

September 1, 01:18

Trend:

stable

Yesterday:

78.6°F

Tomorrow:

78.6°F

Sunrise:

06:30

Sunset:

18:37

Day Length:

12 h. 7 min.

São Tomé in September

Minimum:

81.6°F

Average:

83.0°F

Maximum:

84.5°F

Sea water temperature in São Tomé today

As of now, in São Tomé, the water temperature is 78.6°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is about the same as the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to stay about the same.

Recent sea temperature and forecast

The water temperature today is above average for the last two weeks, showing a small increase in temperature. It also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 79.4°F on 2021, while the historical minimum was 77.3°F on 2025.

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 78.7°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in São Tomé

Date Current Year

actual* / forecast**

last year 10 years average
Aug 18 78.9°F 76.6°F 78.1°F
Aug 19 78.5°F 76.9°F 78.2°F
Aug 20 78.2°F 77.0°F 78.3°F
Aug 21 78.3°F 77.6°F 78.3°F
Aug 22 78.1°F 77.6°F 78.3°F
Aug 23 77.6°F 77.0°F 78.2°F
Aug 24 77.7°F 75.8°F 78.1°F
Aug 25 78.2°F 76.1°F 78.2°F
Aug 26 78.2°F 76.9°F 78.3°F
Aug 27 77.7°F 76.7°F 78.3°F
Aug 28 77.3°F 77.0°F 78.4°F
Aug 29 78.4°F 76.9°F 78.5°F
Aug 30 78.8°F 77.0°F 78.6°F
Aug 31 78.6°F 77.0°F 78.6°F
Sep 1 78.6°F 77.3°F 78.6°F
Sep 2 78.6°F 77.4°F 78.6°F
Sep 3 78.7°F 77.6°F 78.7°F
Sep 4 78.7°F 77.7°F 78.7°F
Sep 5 78.8°F 78.1°F 78.8°F
Sep 6 78.8°F 77.6°F 78.8°F
Sep 7 78.9°F 77.8°F 78.9°F
Sep 8 78.8°F 77.5°F 78.8°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in São Tomé by month

In São Tomé, the water temperature is comfortable for swimming all year round.
The warmest water in São Tomé was recorded on April 28, 2024, reaching a 86.5°F. While the coldest temperature occurred on July 8, 2026, dipping to 72.8°F. The average readings by season are 83.1°F in Winter, 84.0°F in Spring, 79.2°F in Summer, and 80.6°F in Autumn.