What is the current water temperature in Caernarfon?

Q: What is the current water temperature in Caernarfon?

As of now, in Caernarfon, the water temperature is 16.33°C. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it.

United Kingdom > Caernarfon

Water temperature in Caernarfon

Detailed information about the current water temperature in Caernarfon. 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.

61.4

°F

September 21, 14:40

Trend:

decreasing

Yesterday:

62.1°F

Tomorrow:

61.3°F

Sunrise:

07:00

Sunset:

19:19

Day Length:

12 h. 19 min.

Caernarfon in September

Minimum:

45.7°F

Average:

47.5°F

Maximum:

49.6°F

Sea water temperature in Caernarfon today

As of now, in Caernarfon, the water temperature is 61.4°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it. Today's reading is 0.8°F higher than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to fall a bit.

Recent sea temperature and forecast

Today's water temperature is considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It also falls within the range of the average temperature recorded for this date, suggesting a consistent weather trend. The maximum temperature recorded for this date was 62.4°F on 2023, while the historical minimum was 59.1°F on 2017.

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 shows a gradual cooling trend. The average temperature is expected to be 60.9°F, the minimum temperature may reach 60.5°F, and the maximum might stay at 61.3°F.

Daily water temperature in Caernarfon

Date	Current Year actual* / forecast**	last year	10 years average
Sep 7	63.5°F	62.9°F	62.2°F
Sep 8	63.7°F	62.9°F	62.2°F
Sep 9	63.9°F	62.5°F	62.1°F
Sep 10	63.7°F	62.3°F	62.0°F
Sep 11	63.5°F	61.8°F	61.8°F
Sep 12	63.4°F	61.4°F	61.6°F
Sep 13	62.9°F	61.2°F	61.4°F
Sep 14	62.6°F	60.9°F	61.3°F
Sep 15	62.9°F	60.8°F	61.3°F
Sep 16	63.0°F	60.8°F	61.1°F
Sep 17	62.5°F	60.4°F	61.0°F
Sep 18	62.4°F	60.0°F	60.9°F
Sep 19	62.1°F	59.9°F	60.8°F
Sep 20	62.1°F	59.9°F	60.7°F
Sep 21	61.4°F	59.8°F	60.6°F
Sep 22	61.3°F	59.8°F	60.4°F
Sep 23	61.2°F	59.8°F	60.3°F
Sep 24	60.9°F	59.5°F	60.1°F
Sep 25	60.8°F	59.3°F	60.0°F
Sep 26	60.8°F	59.3°F	60.0°F
Sep 27	60.7°F	59.5°F	59.8°F
Sep 28	60.5°F	59.1°F	59.6°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 Caernarfon by month

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

The warmest water in Caernarfon was recorded on August 16, 2026, reaching a 67.6°F. While the coldest temperature occurred on March 11, 2018, dipping to 42.3°F. The average readings by season are 47.3°F in Winter, 49.4°F in Spring, 60.5°F in Summer, and 57.4°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Bangor	61.6°F	8mi
Holyhead	61.5°F	19mi
Conwy	62.1°F	21mi
Aberystwyth	62.7°F	51mi

* current water temperature in this city

** straight line distance from Caernarfon