I did not do a lot offshore last season but I can say that inshore the water is a bit warmer this year then last . Last year, April, May and June were cold with lots of overcast and rainy skys. I know June was a wash out and "summer" didn't hit till the 4th of July.
The water temp in the harbor now is 64 deg already...yes it is in the harbor but we had a string of clear days with strong UV that I think helped to heat the shallow waters a lot.
That said there if you look at the WHOI data from years past you see a trend like this for the end of april
4/27/02 T = 10.0
4/27/03 T= 7.0
4/27/04 T=7.8 Deg C
for May 24:
5/24/02 T= 12.8
5/24/03 T=10.8
5/24/04 sensor dead
So IMO, this is is a little warmer then last year but still a lot cooler then normal. I wish the 04 data was available...
Offshore is more of a global effect...offshore currents ect. Inshore...is sunshine driven IMO.