Water temperature in Calshot in August

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Is it warm enough to swim in Calshot in August? Average water temperature in Calshot in August is 18.8°C and therefore is not suitable for comfortable swimming. The warmest sea in Calshot in August is 21.3°C, and the coldest is 17.2°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Calshot

Changes water temperature in Calshot in August 2025, 2024

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

Sea temperature

Tides

Weather forecast

You can choose any other years:

Day	2025	2024	Min	Max
1 August	19.8°C	20°C	17.2°C	20.5°C
2 August	19.9°C	20.3°C	17.4°C	20.6°C
3 August	19.7°C	19.5°C	17.5°C	20.7°C
4 August	19.3°C	19.4°C	17.4°C	21°C
5 August	19.3°C	19.7°C	17.3°C	20.9°C
6 August	19.4°C	19.6°C	17.6°C	21.1°C
7 August	19.7°C	19.7°C	17.5°C	21.2°C
8 August	19.4°C	19.6°C	17.6°C	21.3°C
9 August	19.6°C	19.8°C	17.7°C	20.9°C
10 August	19.8°C	19.7°C	17.7°C	20.7°C
11 August	19.6°C	20.4°C	17.7°C	20.7°C
12 August	19.4°C	20.3°C	17.5°C	20.9°C
13 August	19.5°C	20.5°C	17.7°C	20.9°C
14 August	20.1°C	20°C	17.8°C	20.8°C
15 August	20.3°C	20.1°C	18°C	20.8°C

Day	2025	2024	Min	Max
16 August	20°C	20.3°C	17.6°C	21.1°C
17 August	20.2°C	20°C	17.7°C	20.5°C
18 August	20.1°C	19.9°C	17.7°C	20.5°C
19 August	20°C	19.8°C	17.8°C	20.9°C
20 August	19.5°C	19.8°C	17.8°C	20.9°C
21 August	19.6°C	19.4°C	17.7°C	20.9°C
22 August	19.4°C	19.3°C	17.8°C	20.1°C
23 August	19.5°C	19.2°C	17.6°C	20.7°C
24 August	19.5°C	18.9°C	17.4°C	21°C
25 August	19.7°C	18.6°C	17.6°C	20.7°C
26 August	19.6°C	18.7°C	17.5°C	20.7°C
27 August	19.4°C	19.2°C	17.4°C	20.8°C
28 August	19.6°C	19°C	17.3°C	20.6°C
29 August	19.5°C	18.8°C	17.6°C	20.5°C
30 August	19.1°C	19°C	17.6°C	20.3°C
31 August	19.1°C	18.9°C	17.6°C	20.1°C

Average water temperature in Calshot in August over a decade

2016	2017	2018	2019	2020
18.7°C	18.6°C	20°C	19.2°C	19.7°C

2021	2022	2023	2024	2025
18.7°C	20.5°C	18.6°C	19.6°C	19.6°C

Calshot sea state in August

Chart comparing the height of waves in Calshot in August 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.

Calshot 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 August. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

	Avr	Min	Max
Gurnard	18.8°C	17.2°C	21.3°C
Warsash	18.8°C	17.3°C	21.5°C
Hill Head	18.7°C	17.2°C	21.3°C
Freemantle	18.8°C	17.2°C	21.6°C
Freshwater	18.5°C	16.8°C	20.9°C
Bembridge	18.7°C	17.1°C	21.1°C
Seaview	18.7°C	17.1°C	21.1°C
Sandown	18.6°C	17°C	20.9°C
Gosport	18.7°C	17.2°C	21.3°C
Southsea	18.7°C	17.2°C	21.3°C

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Our report for Calshot 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