Water temperature in Harlyn in March

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Is it warm enough to swim in Harlyn in March? Average water temperature in Harlyn in March is 9.1°C and therefore is not suitable for comfortable swimming. The warmest sea in Harlyn in March is 10.4°C, and the coldest is 7.2°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Harlyn

Changes water temperature in Harlyn in March 2025, 2024

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

Sea temperature

Tides

Weather forecast

You can choose any other years:

Day	2025	2024	Min	Max
1 March	9.3°C	9.7°C	7.9°C	9.9°C
2 March	9.4°C	9.6°C	8°C	9.8°C
3 March	9.6°C	9.8°C	7.5°C	10°C
4 March	9.3°C	9.4°C	7.4°C	9.8°C
5 March	9.4°C	9.4°C	7.5°C	9.8°C
6 March	9.3°C	9.3°C	7.2°C	9.9°C
7 March	9.4°C	9.5°C	7.4°C	9.9°C
8 March	9.1°C	9.5°C	7.5°C	9.9°C
9 March	9.3°C	9.6°C	7.6°C	10.1°C
10 March	9.4°C	9.6°C	7.5°C	10.1°C
11 March	9.6°C	9.4°C	7.6°C	10°C
12 March	9.6°C	9.2°C	7.8°C	10.1°C
13 March	9.6°C	9.2°C	7.8°C	10.3°C
14 March	9.6°C	9.2°C	7.7°C	10.3°C
15 March	9.6°C	9.4°C	7.8°C	10.3°C

Day	2025	2024	Min	Max
16 March	9.6°C	9.4°C	7.7°C	10.3°C
17 March	9.5°C	9.7°C	7.7°C	10.4°C
18 March	9.6°C	9.7°C	7.8°C	10.3°C
19 March	9.5°C	9.6°C	7.8°C	10.1°C
20 March	9.4°C	9.6°C	7.8°C	9.9°C
21 March	9.7°C	9.8°C	7.7°C	10°C
22 March	9.6°C	10.1°C	7.8°C	10.1°C
23 March	9.6°C	10.1°C	7.9°C	10.1°C
24 March	9.5°C	10.1°C	7.9°C	10.1°C
25 March	9.8°C	10.1°C	7.8°C	10.2°C
26 March	9.9°C	10.2°C	7.7°C	10.2°C
27 March	9.8°C	10.1°C	7.4°C	10.1°C
28 March	10°C	10°C	7.6°C	10.2°C
29 March	10°C	10°C	7.6°C	10.3°C
30 March	10°C	10°C	7.9°C	10.4°C
31 March	10°C	10°C	7.9°C	10.3°C

Average water temperature in Harlyn in March over a decade

2016	2017	2018	2019	2020
9.1°C	9.8°C	7.8°C	9.6°C	9.1°C

2021	2022	2023	2024	2025
9.1°C	9.6°C	9.3°C	9.7°C	9.6°C

Harlyn sea state in March

Chart comparing the height of waves in Harlyn in March 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.

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

	Avr	Min	Max
Trevone	9.1°C	7.2°C	10.4°C
Daymer Bay	9.1°C	7.2°C	10.3°C
Treyarnon	9.3°C	7.4°C	10.5°C
Lundy Bay	9°C	7.2°C	10.4°C
Port Quin	9°C	7.2°C	10.4°C
Newquay	9.3°C	7.4°C	10.6°C
Tintagel	9°C	7.1°C	10.4°C
Holywell	9.3°C	7.5°C	10.6°C
Saint Austell	9.3°C	7.4°C	10.8°C
Par	9.3°C	7.5°C	10.8°C

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Our report for Harlyn 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