Water temperature in Lervik in September

Is it warm enough to swim in Lervik in September? Average water temperature in Lervik in September is 15.4°C and therefore is not suitable for comfortable swimming. The warmest sea in Lervik in September is 18°C, and the coldest is 12.3°C. To find out the sea temperature today and in the coming days, go to Current sea temperature in Lervik

Changes water temperature in Lervik in September 2025, 2024

To get an accurate forecast for the water temperature in Lervik for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Lervik, 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	17.3°C	16.7°C	15.8°C	18°C
2 September	17.2°C	16.4°C	15.9°C	17.7°C
3 September	17.5°C	16.3°C	15.8°C	17.6°C
4 September	17.5°C	16.5°C	15.4°C	17.5°C
5 September	17.7°C	17.3°C	15.1°C	17.7°C
6 September	17.4°C	17.1°C	15.1°C	17.4°C
7 September	17.6°C	17.4°C	15.1°C	17.6°C
8 September		17.4°C	15.1°C	17.4°C
9 September		17.3°C	15°C	17.3°C
10 September		17.5°C	14.7°C	17.5°C
11 September		17°C	14.9°C	17.2°C
12 September		16.6°C	14.7°C	17.3°C
13 September		16°C	14.5°C	17.2°C
14 September		15.6°C	14.4°C	17.3°C
15 September		15.5°C	14.3°C	17.3°C

Day	2024	Min	Max
16 September	14.6°C	14.1°C	16.9°C
17 September	15.2°C	13.9°C	16.6°C
18 September	14.3°C	13.7°C	16.3°C
19 September	15.1°C	13.4°C	16.1°C
20 September	15.5°C	13.2°C	15.8°C
21 September	15.4°C	13.6°C	15.6°C
22 September	15.3°C	13.3°C	15.7°C
23 September	14.6°C	13.2°C	16.2°C
24 September	14.4°C	13.1°C	15.9°C
25 September	15°C	13.1°C	16.2°C
26 September	14.7°C	13°C	16.3°C
27 September	14.5°C	12.8°C	16.1°C
28 September	15.1°C	12.6°C	16.1°C
29 September	14.7°C	12.4°C	15.8°C
30 September	13.4°C	12.3°C	15.4°C

Average water temperature in Lervik in September over a decade

2015	2016	2017	2018	2019
14.8°C	16.4°C	15.2°C	15.9°C	15.4°C

2020	2021	2022	2023	2024
15.7°C	15.7°C	15.6°C	16°C	15.7°C

Lervik sea state in September

Chart comparing the height of waves in Lervik 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.

Lervik 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
Moss	15.3°C	12.3°C	18.1°C
Stroemstad	15.5°C	12.5°C	18.4°C
Tofte	15.2°C	12.3°C	18°C
Drobak	15.1°C	12.3°C	17.9°C
Larvik	15.7°C	12.6°C	18.3°C
Fagerstrand	15.1°C	12.3°C	17.8°C
Oslofjord	15.1°C	12.3°C	17.9°C
Grebbestad	15.7°C	12.5°C	18.6°C
Rafnes	15.4°C	12.5°C	18°C
Porsgrunn	15.4°C	12.5°C	18°C

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Our report for Lervik 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