January
Generally the most favourable seasonal window.
YOUR YEAR BENEATH THE SURFACE
Northern Mariana Islands.
December to May is generally the main season. Swell can close sites such as the Grotto, even when the weather looks settled.
Best-season months: January, February, March, April, May, December
SEE THE WHOLE PICTURE
A month-by-month guide
February
Generally the most favourable seasonal window.
March
Generally the most favourable seasonal window.
April
Generally the most favourable seasonal window.
May
Generally the most favourable seasonal window.
June
A good option, with local differences to consider.
July
A good option, with local differences to consider.
August
Conditions depend more on region, weather or access.
September
Conditions depend more on region, weather or access.
October
Conditions depend more on region, weather or access.
November
Conditions depend more on region, weather or access.
December
Generally the most favourable seasonal window.
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