What is the current water temperature in Castletown?

Q: What is the current water temperature in Castletown?

As of now, in Castletown, the water temperature is 10.49°C. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration.

Isle of Man > Castletown

Water temperature in Castletown

Detailed information about the current water temperature in Castletown. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.

50.9

°F

May 8, 13:25

Trend:

increasing

Yesterday:

50.3°F

Tomorrow:

51.2°F

Sunrise:

05:29

Sunset:

21:03

Day Length:

15 h. 34 min.

Castletown in May

Minimum:

48.3°F

Average:

50.0°F

Maximum:

51.0°F

Sea water temperature in Castletown today

As of now, in Castletown, the water temperature is 50.9°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 1.9°F higher than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to rise a bit.

Recent sea temperature and forecast

The water temperature today is above average for the last two weeks, showing a small increase in temperature. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 50.1°F on 2022, while the historical minimum was 47.6°F on 2018.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the highest values recorded on those days in the past. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 51.5°F, with minimum temperature starting at 51.2°F, while the maximum might reach 52.0°F.

Daily water temperature in Castletown

Date	Current Year actual* / forecast**	last year	10 years average
Apr 24	49.6°F	49.6°F	48.2°F
Apr 25	50.1°F	49.5°F	48.3°F
Apr 26	50.0°F	49.3°F	48.3°F
Apr 27	50.2°F	49.3°F	48.4°F
Apr 28	49.2°F	49.2°F	48.3°F
Apr 29	49.3°F	49.2°F	48.3°F
Apr 30	49.5°F	49.2°F	48.2°F
May 1	50.5°F	49.2°F	48.4°F
May 2	50.5°F	49.4°F	48.5°F
May 3	50.7°F	49.9°F	48.8°F
May 4	50.6°F	49.9°F	48.8°F
May 5	50.8°F	49.8°F	49.0°F
May 6	50.8°F	49.8°F	49.0°F
May 7	50.3°F	50.3°F	49.1°F
May 8	50.9°F	49.2°F	49.0°F
May 9	51.2°F	50.1°F	49.3°F
May 10	51.4°F	50.2°F	49.4°F
May 11	51.4°F	50.1°F	49.4°F
May 12	51.4°F	50.2°F	49.5°F
May 13	51.6°F	50.4°F	49.7°F
May 14	51.6°F	50.4°F	49.7°F
May 15	52.0°F	51.3°F	50.0°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Castletown by month

In an average year, Castletown offers no days when the water temperature is warm enough to swim comfortably.

The warmest water in Castletown was recorded on September 10, 2023, reaching a 61.8°F. While the coldest temperature occurred on March 9, 2018, dipping to 42.8°F. The average readings by season are 49.2°F in Winter, 48.0°F in Spring, 56.8°F in Summer, and 56.8°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Douglas	51.5°F	9mi
Holyhead	52.4°F	53mi
Bangor	52.0°F	62mi
Conwy	53.5°F	64mi
Caernarfon	53.9°F	66mi

* current water temperature in this city

** straight line distance from Castletown