Water temperature in Beihai in September

Is it warm enough to swim in Beihai in September? Average water temperature in Beihai in September is 29.7°C and therefore suitable for comfortable swimming. The warmest sea in Beihai in September is 31.6°C, and the coldest is 26.6°C. Average high air temperature in Beihai in September is 31°C, and average low temperature is 25°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Beihai

Changes water temperature in Beihai in September 2025, 2024

To get an accurate forecast for the water temperature in Beihai for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Beihai, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of September.

Sea temperature

Tides

Weather forecast

You can choose any other years:

Day	2025	2024	Min	Max
1 September	30.3°C	30.7°C	29.1°C	31.1°C
2 September	30.2°C	31.3°C	29°C	31.3°C
3 September	30°C	30.9°C	29.2°C	31°C
4 September	30.3°C	31.3°C	28.5°C	31.3°C
5 September	30.4°C	31.6°C	29.1°C	31.6°C
6 September	30.6°C	31.4°C	28.7°C	31.4°C
7 September	30.4°C	31.2°C	28.6°C	31.3°C
8 September	30.3°C	31°C	28.8°C	31.3°C
9 September	30.3°C	31°C	28.9°C	31.2°C
10 September	30.2°C	30.8°C	28.7°C	30.9°C
11 September	30.7°C	30.6°C	28.2°C	30.8°C
12 September	30.8°C	29.8°C	28°C	30.9°C
13 September	30.9°C	29.8°C	28.4°C	30.9°C
14 September	30.7°C	29.9°C	28.5°C	31.1°C
15 September	30.5°C	29.8°C	28.4°C	31.5°C

Day	2025	2024	Min	Max
16 September	30.4°C	29.8°C	28.6°C	31.4°C
17 September	30.3°C	29.7°C	28.4°C	31.2°C
18 September	30.1°C	29.8°C	28.6°C	31.1°C
19 September	29.9°C	29.6°C	28.8°C	30.9°C
20 September	29.9°C	29.4°C	28.5°C	31.3°C
21 September	29.7°C	29.2°C	28.9°C	31°C
22 September	29.8°C	29.1°C	28.1°C	31°C
23 September	29.9°C	29°C	28.1°C	30.7°C
24 September	29.6°C	28.9°C	26.6°C	30.5°C
25 September	29.5°C	28°C	26.8°C	30.5°C
26 September		28.2°C	26.6°C	30.6°C
27 September		28.3°C	26.7°C	30.6°C
28 September		29.2°C	26.9°C	30.7°C
29 September		29.5°C	26.9°C	30.5°C
30 September		29.7°C	26.9°C	30.4°C

Average water temperature in Beihai in September over a decade

2015	2016	2017	2018	2019
29.4°C	29.5°C	30.5°C	29.4°C	29.9°C

2020	2021	2022	2023	2024
30.1°C	30.5°C	30.4°C	29.6°C	29.9°C

Beihai sea state in September

Chart comparing the height of waves in Beihai in September over the past years. The red line indicates the height of the waves when swimming in the sea is prohibited. To view the current sea conditions, click on the graph.

Weather and climate in Beihai in September

This data display average monthly climate indicators in Beihai in September based on our historical weather readings over a period of ten years. In addition to temperature, we include data on the number of rainy and sunny days so you can have all the information about your destination before your trip

Average HIGH temperature31°C
Average LOW temperature25°C
Average rainfall days13 days
Average rainfall7.8''/198mm

Beihai water temperature during other months:

You can also view information about water temperature for other months by clicking on the month button below

Temperature in neighboring cities

The nearest locations with the average water temperature in September. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

	Avr	Min	Max
Fangcheng	29.8°C	27.3°C	32.2°C
Fangchenggang	29.8°C	27.3°C	32.2°C
Tra Co Beach	29.9°C	27.6°C	32.1°C
Guandu	29.5°C	27.4°C	31.4°C
Potou	29.6°C	27.2°C	31.5°C
Qiantang	29.5°C	27.2°C	31°C
Haibin	29.5°C	27.3°C	31.4°C
Tiaolou	29.5°C	27.2°C	31.2°C
Xinying	29.5°C	27.2°C	31.2°C
Eman	29.5°C	27.2°C	31.3°C

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Our report for Beihai is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.

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Date (day and month)

Water temperature: min 16°C

Average temperature Maximum temperature