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Understanding long dominat wave period

Old 07-28-2020, 06:31 AM
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Default Understanding long dominat wave period

Looking at Saturdays forecast had me a intrigued by the 13 to 14 sec dominant wave period and wave height. I assume its a ground swell caused by the storms in the Atlantic? I dont ever recall being out in such a situation, and with 4 to 6 waves in the forecast I doubt this weekend would be a good time to try it out. What would a day like that look like? I assume they would be huge rollers, but the wind kicking up probably causes a short secondary wave. Just looking insight from the more experienced captains on here.
Old 07-28-2020, 06:49 AM
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If there are no wind waves 6 feet by 13 seconds is flaaaat. Depending on swell direction could stake up the inlet on an outgoing but will be very comfortable on the open water.
Old 07-28-2020, 07:58 AM
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That was my understanding was that near shore the beaches and inlets could get stacked up pretty bad, but further offshore would be nice.
Old 07-28-2020, 08:05 AM
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Fished a forecast like that last fall after a hurricane passed by off our coast... dont remember which storm possibly Humberto but it was mid-late September none the less there was zero wind at all but like 6ft huge rollers spaced wayyy out and it was a great day hammered the fish and it was perfectly comfortable... and I think because there was actually a small craft advisory that day it wasn’t crowded at all.... was trolling beside a sporty and would loose sight of him tower and all in the troughs pretty cool

Last edited by Skipjack44; 07-28-2020 at 08:12 AM.
Old 07-28-2020, 12:11 PM
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If you can find the second wind wave period predicted I would focus on that. If none is predicted bc of low wind, then it should be flat and very nice.Reef Cast offers a nice graph to look at that.
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Old 07-28-2020, 03:02 PM
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4-6 @ 13-14 seconds with no wind, going surfing not fishing!
Seriously, fishing in those conditions is pretty cool, watching the spread in those conditions with the baits dancing is sweet.
as long as your inlet is GTG You should be fine
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Old 07-29-2020, 06:47 AM
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Did an overnighted in norfolk canyon years ago when Bertha was passing. Similar forecast. Very comfortable and hammered the fish.
Old 07-29-2020, 06:59 AM
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Don’t think I’d be able to get out our inlet in that. 3ft coming through with no wind or tide is a big roll. Can’t imagine 6ft


ocean would be relatively flat. We used to get a day or two a year with those conditions and I’d be surfing. Those unicorn days
Old 07-29-2020, 07:57 AM
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Fished a big swell like that out of Hatteras in May. The inlet was terrible, but it was great once we crossed the bar.
Old 07-29-2020, 08:46 AM
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Looks like winds in the 20 mph range are forecasted, so I doubt I'll be busting the inlet wide open. I can imagine most NC inlets would be sporty ride out with that big of swell either way.
Old 07-29-2020, 09:37 AM
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Ditto what the others have said, surfing forecast for sure!! Beware of shallow water and you should be fine.

EDIT: as long as the wind/secondary wave forecast is good....
Old 07-29-2020, 11:11 AM
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I've been watching too and no go for me. 4-6 every 12 makes no sense given the projected 15kt winds imo. I can see the potential for serious nasty.
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Old 07-31-2020, 10:50 AM
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I fished in Barbados in 18'-20' swells about 45 seconds apart. It was nuts! There was one of their military cutter ships about 1000yds off port and it would just disappear between the swells... My wife got sick as a dog, but I was drinkin' rum & Cokes like it was goin' outta style. It was one heck of a slow day, though; I got one huge wahoo to show for it.

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