The highest day temperature in May 2025 was 86°F. The lowest night temperature was 68°F. The average values for day and night temperatures during May were 78.5°F и 72.6°F respectivly.

The average sea surface temperature in May 2025 for Cabo Frio was 76.6°F. The maximum and minimum values were 74.4°F and 78.8°F respectively.

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

Precipitation total in May for Cabo Frio is 0.5 in. It makes may one of the least rainy months of the year.

The average wind speed in May is 8.4 mph. It makes May one of the most windless months of the year for Cabo Frio.

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 Cabo Frio in May is 6.9 hours.