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...S wind 20 kt becoming SE 40 kt in the afternoon. Seas 10 ft. Rain. .TONIGHT...S wind 40 kt. Seas 15 ft. Rain. .THU...SW wind 45 kt. Seas 21 ft building to 29 ft in the afternoon. Widespread rain showers. .THU NIGHT...W wind 50 kt. Seas 34 ft. .FRI...NW wind 45 kt. Seas 30 ft. .SAT THROUGH SUN...SW wind 40 kt. Seas 15 ft.