What is the current water temperature in Hamilton?

Q: What is the current water temperature in Hamilton?

As of now, in Hamilton, the water temperature is 5.59°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.

Canada > Hamilton

Water temperature in Hamilton

Detailed information about the current water temperature in Hamilton. 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.

42.1

°F

May 11, 03:22

Trend:

stable

Yesterday:

42.1°F

Tomorrow:

42.2°F

Sunrise:

06:00

Sunset:

20:32

Day Length:

14 h. 32 min.

Hamilton in May

Minimum:

36.4°F

Average:

38.6°F

Maximum:

39.4°F

Water temperature in Hamilton today

As of now, in Hamilton, the water temperature is 42.1°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 2.5°F lower than the average recorded on this particular day in recent years. The water temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to rise a bit.

Recent water 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 minimum temperature for this date. The maximum temperature recorded for this date was 47.4°F on 2016, while the historical minimum was 42.5°F on 2020.

latest data

last year

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the minimum recorded over the past years. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 43.5°F, with minimum temperature starting at 42.2°F, while the maximum might reach 45.0°F.

Daily water temperature in Hamilton

Date	Current Year actual* / forecast**	last year	10 years average
Apr 27	39.3°F	40.8°F	41.3°F
Apr 28	40.0°F	41.5°F	41.8°F
Apr 29	39.9°F	42.4°F	41.7°F
Apr 30	40.0°F	42.7°F	41.6°F
May 1	42.9°F	42.8°F	42.3°F
May 2	40.6°F	43.1°F	42.3°F
May 3	41.4°F	44.3°F	42.8°F
May 4	41.5°F	44.2°F	42.9°F
May 5	41.8°F	44.2°F	43.2°F
May 6	42.2°F	44.5°F	43.4°F
May 7	42.5°F	43.7°F	44.0°F
May 8	41.8°F	44.3°F	44.4°F
May 9	42.1°F	44.3°F	44.4°F
May 10	42.1°F	44.5°F	44.6°F
May 11	42.1°F	44.4°F	44.6°F
May 12	42.2°F	44.6°F	44.7°F
May 13	42.8°F	47.9°F	45.3°F
May 14	42.8°F	47.5°F	45.3°F
May 15	43.5°F	47.4°F	46.0°F
May 16	43.7°F	47.4°F	46.2°F
May 17	44.3°F	47.4°F	46.8°F
May 18	45.0°F	47.6°F	47.5°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.

Water temperature in Hamilton by month

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

The warmest water in Hamilton was recorded on August 28, 2021, reaching a 77.8°F. While the coldest temperature occurred on February 6, 2026, dipping to 33.9°F. The average readings by season are 38.1°F in Winter, 41.2°F in Spring, 66.4°F in Summer, and 58.4°F in Autumn.