There are two distinct seasons, a dry season from November to April with light rainfall and a wet season from May till October when heavy rainfall occurs.
Guatemala is a year round surf destination; water with temps in the low 80’s and air temperatures in the mid to high 80’s year round. Strong sun protection is mandatory.
Do not get discouraged by the rainy season with its afternoon onshore flow of wind. The weather patterns at this time of year see glassy mornings with a light onshore flow starting in the late morning to early afternoon. Although this time of year can see a lot of rain, rain showers usually start in the late afternoon; often raining through the night.