Coastal Waters Forecast for Southwest Alaska+Bristol Bay+The Alaska Peninsula Waters and the Aleutian Islands up to 100 nm out. Wind forecasts reflect the predominant speed and direction expected. Sea forecasts represent an average of the highest one-third of the combined wind wave and swell height. .TODAY...SW wind 20 kt. Seas 11 ft. .TONIGHT...E of Saint Matthew Island, SE wind 30 kt. W of Saint Matthew Island, S wind 30 kt becoming SE 40 kt after midnight. Seas 12 ft. Rain. .THU...SE wind 40 kt. Seas 14 ft. Rain. .THU NIGHT...E wind 40 kt. Seas 17 ft. .FRI...N wind 40 kt. Seas 19 ft. .SAT...NW wind 35 kt. Seas 15 ft. .SUN...E wind 40 kt. Seas 11 ft.