Here is what you want to look for with regards to swell forecast. Below is the actual NWS forecast for next Tuesday and Wednesday. Note on Wednesday a swell starts to develope. Here is a link to the weather site. Tomorrow when they add Thursday to the forecast you will get a better idea if they expect it to increase in size or end quickly. By 3 days out this forecast gets very accurate. 2 days out take it to the bank for planning.
https://forecast.weather.gov/shmrn.php?mz=amz715TUESDAY
East winds 10 to 15 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant period 10 seconds.
Scattered showers.
WEDNESDAY
East winds 10 to 15 knots. Seas 3 to 5 feet with
occasional seas up to 6 feet. Dominant period 11 seconds.
NORTHWEST SWELL around 4 feet. Scattered showers.
You can handle a 4 foot swell in CDB on a cat but the boat will move. Anything more than that will be bad news. I use 3 as my limit to overnight.
