Cape Neddick — Water Temperature in May

Water Temperature Range

6°C

minimum

10°C

average

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

May: Climate and Swimming Opportunities

Average Night Air Temperature

8°C

Average Day Air Temperature

18°C

Precipitation Amount per Month

90 mm

Number of Rainy Days

Daylight per Day

14 hrs

Sunshine per Day

8 hrs

Average Wind Speed

16 km/h

Average Humidity

66%

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.