It is ultimately the responsibility of the renter to know what the forecast is and whether or not they are capable of safely navigating a vessel on the ocean in Alaska. Weather forecasts are not always accurate and weather in Alaska changes rapidly, good or bad. Here are some tools for you to consider:

North Gulf Coast Marine Forecast provided by NOAA - You will want to focus on the sections specifically stating Cape Cleare to Gore Point and Resurrection Bay. https://www.ndbc.noaa.gov/data/Forecasts/FZAK51.PAFC.html
Windfinder.com - This forecast covers weather east of Resurrection Bay.
https://www.windfinder.com/forecast/cape-cleare-17nm-south-of-montague-islan
Pilot Rock - This provides hourly wind and barometric data about 25 miles south of Seward.
https://www.ndbc.noaa.gov/station_page.php?station=pila2
Cape Cleare Buoy Data provided by NOAA
https://www.ndbc.noaa.gov/station_page.php?station=46076
Buoyweather - This forecast is for the Kennedy Entrance, just southwest of the Kenai Peninsula.
http://www.buoyweather.com/forecast/marine-weather/@59.355596110016315,-148.53515625