The highest day temperature in May 2026 was 92°F. The lowest night temperature was 52°F. The average values for day and night temperatures during May were 76.1°F и 60.2°F respectivly.

The average sea surface temperature in May 2026 for Islantilla was 66.5°F. The maximum and minimum values were 62.6°F and 74.2°F respectively.

Most of the days in May are sunny but you can also expect cloudy and gloomy days.

Precipitation total in May for Islantilla is 0.2 in. It makes may one of the least rainy months of the year.

The average wind speed in May is 9.2 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Islantilla in May is 11.4 hours.