Assateague Island — Water Temperature in May

Water Temperature Range

10°C

minimum

16°C

average

22°C

maximum

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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
MAY 1	-10°C	13°C	12°C	13°C
MAY 2	13°C	12°C	12°C	12°C
MAY 3	13°C	13°C	13°C	13°C
MAY 4	13°C	13°C	13°C	13°C
MAY 5	14°C	14°C	14°C	14°C
MAY 6	13°C	14°C	14°C	15°C
MAY 7	14°C	14°C	14°C	14°C
MAY 8	14°C	14°C	14°C	15°C
MAY 9	14°C	14°C	14°C	14°C
MAY 10	14°C	14°C	14°C	15°C
MAY 11	14°C	14°C	14°C	15°C
MAY 12	15°C	15°C	15°C	15°C
MAY 13	15°C	14°C	14°C	14°C
MAY 14	15°C	15°C	15°C	15°C
MAY 15	15°C	15°C	15°C	15°C
MAY 16	15°C	15°C	15°C	15°C
MAY 17	15°C	16°C	16°C	16°C
MAY 18	16°C	16°C	16°C	16°C
MAY 19	16°C	17°C	17°C	17°C
MAY 20	16°C	17°C	17°C	18°C
MAY 21	17°C	17°C	17°C	17°C
MAY 22	17°C	18°C	18°C	18°C
MAY 23	17°C	18°C	18°C	18°C
MAY 24	17°C	19°C	19°C	19°C
MAY 25	17°C	18°C	18°C	18°C
MAY 26	16°C	19°C	19°C	18°C
MAY 27	16°C	19°C	19°C	18°C
MAY 28	17°C	19°C	19°C	19°C
MAY 29	17°C	19°C	19°C	19°C
MAY 30	18°C	18°C	18°C	17°C
MAY 31	18°C	18°C	18°C	17°C

May: Climate and Swimming Opportunities

Average Night Air Temperature

11°C

Average Day Air Temperature

22°C

Precipitation Amount per Month

92 mm

Number of Rainy Days

Daylight per Day

14 hrs

Sunshine per Day

9 hrs

Average Wind Speed

15 km/h

Average Humidity

72%

At such water and air temperatures, swimming feels cool and invigorating. It’s comfortable for a quick dip, and you’ll feel fine as long as you warm up soon after.