Sea Temperature in Long Island in May

Complete information on the sea temperature range in the Atlantic Ocean in Long Island in May. Historical daily data. Climate details for May. Tips on swimming conditions and beach relaxation in Long Island. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Water Temperature Range in Long Island in May

8°C

MINIMUN

12.5°C

AVERAGE

17°C

MAXIMUM

Historical Data of Water Temperature in May in Long Island

Water Temperature Chart for Atlantic Ocean in Long Island in May

Sea Temperature Table in Long Island in May Over the Past Years

Day	2024	2023	2022	Average
May 1	11°C	8°C	8°C	9.3°C
May 2	11°C	8°C	9°C	9.5°C
May 3	10°C	9°C	9°C	9.5°C
May 4	11°C	9°C	9°C	10.0°C
May 5	11°C	9°C	10°C	10.3°C
May 6	11°C	9°C	10°C	10.3°C
May 7	11°C	9°C	10°C	10.3°C
May 8	11°C	9°C	10°C	10.3°C
May 9	11°C	9°C	11°C	10.8°C
May 10	11°C	9°C	11°C	10.8°C
May 11	11°C	9°C	11°C	10.3°C
May 12	11°C	9°C	12°C	10.8°C
May 13	12°C	10°C	12°C	11.3°C
May 14	12°C	10°C	12°C	11.5°C
May 15	13°C	10°C	13°C	11.8°C
May 16	13°C	10°C	13°C	12.0°C
May 17	14°C	11°C	13°C	12.5°C
May 18	13°C	11°C	13°C	12.3°C
May 19	14°C	11°C	14°C	12.8°C
May 20	15°C	11°C	14°C	13.0°C
May 21	15°C	11°C	14°C	13.3°C
May 22	16°C	11°C	15°C	13.8°C
May 23	16°C	11°C	15°C	13.8°C
May 24	16°C	11°C	15°C	14.0°C
May 25	16°C	11°C	16°C	14.5°C
May 26	17°C	11°C	16°C	14.8°C
May 27	17°C	12°C	16°C	15.3°C
May 28	16°C	13°C	16°C	15.3°C
May 29	15°C	13°C	17°C	15.3°C
May 30	14°C	14°C	17°C	15.3°C

Long Island Climate and Swimming Opportunities in May

20°C

Average Day Air Temperature

9°C

Average Night Air Temperature

91 mm

Precipitation Amount per Month

11 days

Number of Rainy Days

14 hrs

Daylight
per Day

9 hrs

Sunshine
per Day

15 km/h

Average Wind Speed

69%

Average
humidity

Long Island lies within the New York in United States. The average daytime temperature in Long Island in May is 68°F (20°C), while the nighttime average is 49°F (9°C). There are typically 11 rainy days during the month, with a total precipitation of 3.6 inches (91 mm). The daylight duration in May in Long Island is 14 hours, with an average of 9 hours of sunshine per day. The average wind speed in May is 9 mph (15 km/h), and the humidity level is around 69%.

The water temperature in Long Island in May ranges from 48°F to 59°F (9°C to 15°C). At the beginning of the month, the average temperature is around 50°F (10°C), shifting to 52°F (11°C) by mid-May and reaching 57°F (14°C) in the last ten days. Overall, the average sea temperature in Long Island for May is 54°F (12°C). Ideal conditions for a refreshing swim, though some may still find it a bit cool.

Sea Temperature in May in Nearby Cities

Frequently Asked Questions About Water Temperatures in May in Long Island

What is the sea temperature in Long Island in May?

The water temperature in the Atlantic Ocean in Long Island in May ranges from 48°F to 59°F (9°C to 15°C).

Is it possible to swim in the Atlantic Ocean in Long Island in May?

The average sea temperature in Long Island in May is 54°F (12°C), and the air temperature is 68°F (20°C), so ideal conditions for a refreshing swim, though some may still find it a bit cool.