Finland
Gustavsvärn
About this Dive Site
Description
Explore the waters near the historic Gustavsvärn fortress, a captivating dive site offering diverse underwater topography. Encounter steep walls and rocky formations teeming with Baltic herring and whitefish, providing a dynamic and visually engaging dive experience.
Best Time to Dive
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2°C | 2°C | 4°C | 7°C | 12°C | 17°C | 20°C | 19°C | 16°C | 12°C | 8°C | 4°C |
Peak Season
May, June, July, August, September
Jan
Cold water, potential for ice near shore.
Feb
Cold water, potential for ice near shore.
Mar
Ice breaking up, visibility can be variable.
Apr
Spring melt, clearer waters, increasing marine life.
More monthly highlights
May
Good visibility, start of seal sightings.
Jun
Excellent visibility, abundant seal activity.
Jul
Warmest water, great for longer dives.
Aug
Continued good conditions, potential for plankton blooms affecting visibility slightly.
Sep
Water cools, visibility often improves again, good seal encounters.
Oct
Autumn diving, good visibility, seals still present.
Nov
Cold water diving, visibility can be good.
Dec
Very cold water, potential for ice formation.
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