How I Read Boca Inlet Before I Run It
Boca Inlet is short, shallow and busy. I'm newer to boating, so I lean on a checklist instead of instinct. Here is what I check, in order, and where each one lives in Gillby.
THE SHORT ANSWER
Before I run Boca Inlet I check five things, in order: wind against the tide, swell height and period, the chop index for my boat, lightning, and tide stage. If the wind fights an outgoing tide or a long swell is breaking on the bar, I wait or stay in.
AT A GLANCE
- Wind against an outgoing tide stacks waves at the mouth.
- Read swell height and period together. Long period hits the bar harder.
- Use a chop reading for your boat, not a generic one.
- Check lightning for the ride home, not just the ride out.
- Know the tide stage and the next high and low.
Is the wind fighting the tide?
This is the first thing I look at. An outgoing tide running into an onshore wind stacks the waves up at the mouth. Wind and tide going the same way lays it down.
In Gillby the wind and the tide sit on the same timeline. I slide to my departure hour and read both at once, instead of lining up two apps by hand.
How big is the swell, and how long is the period?
Height alone does not tell you much. A long-period swell carries more energy and hits the bar harder than the same height at a short period.
Gillby shows both together for every hour. For Boca it references NDBC buoy 41122 off Hollywood. That is a reference point offshore, not a reading at the mouth of the inlet.
How choppy will it be for my boat?
This is the one number I always wanted. Gillby rolls wave height, period and wind into a chop reading for your boat, so a 21-foot center console gets a different answer than a big sportfish.
Is there lightning around?
Afternoon storms build fast here. Gillby pulls lightning flashes from the GOES-19 satellite every 20 seconds, draws distance rings and runs an all-clear countdown. I check the hourly thunder chance for the ride home too, not just the ride out.
Where is the tide in its cycle?
Boca is shallow at the mouth and the bars move. I want to know where the tide is in its cycle and when the next high and low land. Gillby uses the NOAA tide station for Boca Raton and shows how much water is over the nearby sandbars right now.
Then I look at the cams. Seeing the mouth beats any number.
A real night: the answer was no
- Wind
- NE, 22.7 kt, gusting 29.4 kt
- Seas
- 6.7 ft at 11.2 s from the NNE
- Chop index
- 9.8, very rough
- Tide
- 0.62 ft MLLW and rising. High of 1.86 ft at 3:47 AM
- Thunder chance
- 9%
- Advisory
- Small Craft Advisory in effect
- Inlet verdict
- No-go
Hourly reading for 10:00 PM ET, Sunday, October 18, 2026, from the public Gillby API (updated 10:30 PM ET).
The tide was coming in, which usually helps at the mouth. It did not matter. Almost seven feet at eleven seconds with a Small Craft Advisory up is a stay-at-the-dock night.
Gillby showed me that on one screen. That is the whole reason I built it.
The one rule
This is my checklist, not gospel. I'm still learning, and the folks who have run this inlet for decades know it better than any app. Gillby helps me plan. When I get to the inlet, what I see with my own eyes wins.
Want the bigger picture? Read what to check before any Florida water day, or why I built Gillby.
Quick answers
When is Boca Inlet most dangerous?
Usually when an outgoing tide runs into a strong onshore wind or a long-period swell, which stacks steep waves at the mouth and over the bar.
Which buoy should I check for Boca Inlet?
Gillby references NDBC buoy 41122 off Hollywood for Boca. It is an offshore reference, not a reading at the inlet itself.
Where are the tides for Boca Inlet?
NOAA tide station 8722816 at Boca Raton. Gillby shows its highs, lows and the current stage on the same timeline as wind and waves.
Does a rising tide make the inlet safe?
No. An incoming tide often helps, but big swell or a Small Craft Advisory can still make it a no-go.
Check your inlet before you go.
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