Friday Harbor — Water Temperature in June

Water Temperature Range

9°C

minimum

11°C

average

14°C

maximum

Get instant access to real-time water temperatures for this and all other locations with our iOS and Android apps.

Water Temperature Chart for Month

The chart shows the average daily water temperature for each day of the month based on historical data.

Table of Water Temperatures by Day of the Month for Previous Years

Day	2026	2025	2024	2023
JUN 1	-10°C	12°C	10°C	10°C
JUN 2	11°C	10°C	10°C	10°C
JUN 3	12°C	11°C	10°C	11°C
JUN 4	12°C	11°C	10°C	11°C
JUN 5	12°C	11°C	10°C	11°C
JUN 6	12°C	11°C	11°C	10°C
JUN 7	12°C	11°C	11°C	10°C
JUN 8	11°C	11°C	11°C	10°C
JUN 9	-10°C	11°C	11°C	11°C
JUN 10	11°C	11°C	11°C	10°C
JUN 11	12°C	10°C	11°C	10°C
JUN 12	12°C	11°C	11°C	10°C
JUN 13	12°C	10°C	10°C	10°C
JUN 14	12°C	11°C	11°C	10°C
JUN 15	12°C	11°C	11°C	10°C
JUN 16	12°C	11°C	11°C	10°C
JUN 17	13°C	11°C	10°C	11°C
JUN 18	14°C	11°C	10°C	11°C
JUN 19	12°C	11°C	10°C	11°C
JUN 20	13°C	11°C	10°C	11°C
JUN 21	13°C	11°C	10°C	12°C
JUN 22	13°C	11°C	11°C	13°C
JUN 23	12°C	11°C	10°C	12°C
JUN 24	13°C	11°C	11°C	11°C
JUN 25	12°C	11°C	11°C	11°C
JUN 26	13°C	11°C	11°C	11°C
JUN 27	13°C	11°C	11°C	12°C
JUN 28	12°C	11°C	10°C	11°C
JUN 29	13°C	11°C	10°C	12°C
JUN 30	13°C	11°C	11°C	12°C

June: Climate and Swimming Opportunities

Average Night Air Temperature

11°C

Average Day Air Temperature

19°C

Precipitation Amount per Month

73 mm

Number of Rainy Days

Daylight per Day

16 hrs

Sunshine per Day

8 hrs

Average Wind Speed

10 km/h

Average Humidity

74%

With such a ratio between the average monthly temperatures of water and air, swimming feels very cold and is only for cold-water enthusiasts. Most people will prefer just a brief splash, because warming up afterward can take time.