Water temperature in Greater Napanee

This data the coastal Greater Napanee water temperature today, tomorrow and the upcoming days. Besides, you can also get information about the weather and surf forecast, as well as the data on sunrise / sunset and moonrise / moonset at a given point on any given day.

Current water temperature in Greater Napanee

Water temperature in Greater Napanee today is 18.6°C. Based on our historical data over a period of ten years, the warmest water in this day in the Lake Ontario near Greater Napanee was recorded in 2017 and was 22.1°C, and the coldest was recorded in 2014 at 17.9°C. Water temperature in Greater Napanee is expected to drop to 17.6°C in the next 10 days. September average water temperature in Greater Napanee is 20.7°C, the minimum temperature is 17.1°C, and the maximum is 24°C.

The swimming season in Greater Napanee lasts from July to September. During those months, Greater Napanee water temperature does not drop below 20°C and therefore suitable for comfortable swimming. The average water temperature in Greater Napanee in winter reaches 2.5°C, in spring 4.7°C, in summer the average temperature rises to 20.2°C, and in autumn it is 15.5°C.

Greater Napanee water temperature now

Surf Forecast in Greater Napanee for today

Another important indicators for a comfortable holiday on the beach are the presence and height of the waves, as well as the speed and direction of the wind. Please find below data on the swell size for Greater Napanee. We calculate the swell size based on the mean wave height (trough to crest) of each third highest wave. For more information on surf forecasts for the next ten days, please visit sea state forecast Greater Napanee. Data in table shown for 26 September 2025, time in GMT 0 format (you can change the time zone on the sea state forecast page)

Surf report in Greater Napanee

Greater Napanee weather forecast

Current temperature and weather

Data in a table show Greater Napanee temperature today (26 September 2025). For more information and forecast for a few days, go to the weather forecast Greater Napanee.

0-3 h	3-6 h	6-9 h	9-12 h
17.8°C	17.5°C	16.7°C	17°C

12-15 h	15-18 h	18-21 h	21-24 h
19.2°C	22°C	21.3°C	18.4°C

Greater Napanee water temperature by month

These figures shows the average, minimum and maximum monthly water temperature in Greater Napanee. In addition to the table values, the graph below displays of changes average surface temperature during the year. Values are calculated based on the data over the past 10 years. Using them, you can check the water temperature in Greater Napanee on any day of this period that interests you. Click on the month link and you will see a table for each day, or alternatively you can view the temperature curve of the month and select 2 different years you want to compare, either in a table or as a curve

Chart monthly average water temperature in Greater Napanee

The nearest beaches and cities from Greater Napanee with the water temperature today, as well as the air temperature and the state of the weather during the day and the average wave height for today

	Water	Weather		Wave
Picton	18.4°C	19°C		0.29 m
Kingston	18.5°C	21°C		0.16 m
Prince Edward	18.7°C	20°C		0.42 m
Sandbanks	18.6°C	20°C		0.45 m
North Beach	18.9°C	20°C		0.36 m
Gananoque	17.9°C	22°C		0.23 m
Brighton	18.6°C	20°C		0.35 m
Henderson Harbor	18.5°C	19°C		0.27 m
Pillar Point	18.5°C	19°C		0.27 m
Sackets Harbor	18.5°C	19°C		0.27 m

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Our report for Greater Napanee 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.