Surf Forecasts:
Jupiter Inlet South Jetty surf forecast from 11 Sep 2026:
- Most powerful swell: Thursday 17 Sep, 8PM (local time) - 2.5ft (0.7m), 7s period, NE swell with 54 kJ wave energy.
Best Forecast Surf Conditions for Jupiter Inlet South Jetty this week:
The most powerful waves expected at Jupiter Inlet South Jetty in the next 16 days are 0.7m 7s and forecast to arrive on Thursday (Sep 17) at 8PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 4s period and expected on Sunday (Sep 13) at 8PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Thu 17th Sep) | 2.5ft (0.7m) 7s |
Table - best surf conditions forecast for Jupiter Inlet South Jetty over the next 16 days.
The Lowdown
Alright, Rusty here. Let's get into this one.
Alright, truth is, for the next week or so, we've got barely a ripple. It’s a pretty dire start, a real flat spell to get through. The good news? There's a pulse building way out there, and we're looking at a sweet payoff if we can be patient. The water temp is sitting around 86°, which is a touch warmer than normal for this time of year, just so you know for the first session.
From Thursday the 10th all the way through to the end of the weekend on September 21st, it’s mostly poor surf conditions with tiny swell and onshore winds. There’s a brief window on Thursday afternoon the 10th with glassy conditions at Jupiter Inlet South Jetty, and a tiny 2ft NE swell, but the combined energy is weak (93) so it's not going to get you too excited. After that, it’s a long stretch of flatness and choppy, messy water. Not worth paddling out for.
Now, hold onto your board. Things change dramatically on Monday the 22nd. The wind goes whacko – storm force cross-shore on Tuesday morning the 22nd turning to strong cross-off in the afternoon – but the swell is building. The real show starts on Wednesday the 23rd of September. We’ve got a clean 7ft to 7ft swell from the NE, and the wind turns offshore from the WSW. Combined energy jumps into the strong zone (730 to 852) – that’s some serious power. For the advanced crew only at this size, but it’ll be clean and lined up at Jupiter Inlet South Jetty.
The standout in this entire run is Thursday the 24th of September. The swell drops slightly to a still-very-solid 6ft from the NE, but the wind goes *glass* – dead calm from the north. You cannot ask for better conditions. It's going to be clean, smooth, and the best session of the two weeks by a mile (moderate energy at 543). The afternoon on the 24th gets a bit questionable with an onshore kick, so get it early.
Friday the 25th sees it dropping off fast, back to under 3ft, with poorer cross-shore winds. That’s your window.
So, the call: Suffer through the flat spell this week. Mark your calendar for Thursday morning, September 24th. That glassy, solid NE swell at Jupiter Inlet South Jetty is the one. It'll be crowded though – that spot gets busy – but for a morning session like that, you paddle out anyway.
Rusty.
Short Range ForecastHeavy rain (total 41mm), heaviest during Thu afternoon. Warm (max 30°C on Thu afternoon, min 27°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Sun afternoon. Warm (max 30°C on Sun afternoon, min 28°C on Sun night). Wind will be generally light. | |||||||||||||||||||
Thu 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | ||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | NE 7 | NE 7 | NE 6 | NE 10 | NE 9 | SE 4 | SE 4 | SE 4 | SE 4 | E 9 | ENE 9 | ENE 8 | ENE 8 | E 8 | ESE 4 | ENE 10 | E 4 | ESE 5 | ENE 5 | E 4 |
Wave Graph  | ||||||||||||||||||||
 kJ | 51 | 29 | 21 | 14 | 13 | 13 | 11 | 9 | 16 | 7 | 7 | 7 | 7 | 6 | 10 | 10 | 32 | 15 | 28 | 18 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | on | on | on | on | cross-on | on | cross-on | cross-on | cross-on |
High Tide | 8:51PM1.01m | 9:15AM1.04m | 9:33PM1.01m | 10:00AM1.04m | 10:13PM0.99m | 10:42AM1.02m | 10:52PM0.96m | 11:24AM0.98m | 11:31PM0.92m | 12:05PM0.93m | 00:11AM0.87m | 12:47PM0.87m | 00:53AM0.83m | |||||||
Low Tide | 2:17PM0.04m | 2:39AM0.02m | 3:02PM0.06m | 3:22AM0.01m | 3:46PM0.10m | 4:05AM0.02m | 4:29PM0.16m | 4:47AM0.06m | 5:11PM0.23m | 5:29AM0.13m | 5:54PM0.30m | 6:13AM0.21m | 6:40PM0.37m | |||||||
 |  |  |  | |  | | | | |  |  | |  | | | | | | | |
 | — | — | 7:03 | — | — | 7:03 | — | — | 7:03 | — | — | 7:05 | — | — | 7:05 | — | — | 7:05 | — | — |
 | 7:30 | — | — | 7:29 | — | — | 7:28 | — | — | 7:27 | — | — | 7:25 | — | — | 7:24 | — | — | 7:23 | — |
mm | 8 | 7 | — | — | 1 | 6 | 9 | 5 | 5 | 2 | — | — | — | — | — | — | — | — | — | 5 |
Temp °C | 30 | 29 | 29 | 30 | 29 | 29 | 30 | 29 | 29 | 30 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 28 | 28 |
Feels °C | 31 | 33 | 32 | 32 | 31 | 32 | 33 | 32 | 33 | 33 | 32 | 33 | 32 | 31 | 31 | 30 | 28 | 30 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | NE 7 | NE 7 | NE 6 | NE 6 | ENE 6 | ENE 6 | ENE 5 | ENE 5 | ESE 9 | SSE 4 | SSE 5 | ENE 8 | ENE 8 | E 8 | E 8 | SE 4 | ENE 10 | ESE 5 | ENE 9 | NNE 6 |
| kJ | 51 | 29 | 21 | 9 | 8 | 4 | 2 | 2 | 7 | 4 | 4 | 7 | 7 | 5 | 1 | 10 | 9 | 15 | 8 | 7 |
Swell 2 Height (m) Direction Period (s) | NE 9 | NE 8 | NE 8 | NE 10 | NE 9 | NE 9 | SE 8 | ESE 8 | E 8 | E 9 | ENE 9 | S 4 | E 8 | E 8 | E 10 | ENE 10 | E 9 | ENE 9 | E 9 | ENE 9 |
| kJ | 26 | 11 | 11 | 14 | 13 | 3 | 3 | 7 | 5 | 6 | 7 | 1 | 1 | 1 | 2 | 9 | 2 | 8 | 2 | 7 |
Swell 3 Height (m) Direction Period (s) | E 8 | E 8 | NE 10 | SE 7 | NE 9 | SE 8 | NE 8 | E 9 | E 5 | ESE 9 | ESE 8 | SE 8 | — | E 11 | E 8 | N 6 | — | E 9 | — | E 7 |
| kJ | 1 | 1 | 4 | 2 | 3 | 2 | 3 | 6 | 1 | 7 | 7 | 3 | — | 2 | 1 | 1 | — | 1 | — | 1 |
Wind waves Height (m) Direction Period (s) | SE 4 | SE 4 | SE 4 | SE 4 | SE 3 | SE 4 | SE 4 | SE 4 | SE 4 | SE 4 | ESE 4 | ESE 3 | SE 3 | ESE 3 | ESE 4 | ENE 4 | E 4 | ENE 5 | ENE 5 | E 4 |
| kJ | 15 | 9 | 9 | 9 | 7 | 13 | 11 | 9 | 16 | 4 | 2 | 1 | 3 | 6 | 10 | 6 | 32 | 15 | 28 | 18 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 61 | 327 | 1453 | 327 | 327 | 1586 | 203 | 112 | 203 | 112 | 112 | 1551 | 328 | 984 | 1628 | 909 | 778 | 921 | 1160 |
Best forecast wave conditions in South Florida | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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Information about the Jupiter Inlet South Jetty Surf forecast
The above surf forecast table for Jupiter Inlet South Jetty provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Jupiter Inlet South Jetty can be found by selecting the local surf guide option on the grey menu. Our Jupiter Inlet South Jetty surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Jupiter Inlet South Jetty) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Jupiter Inlet South Jetty may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Jupiter Inlet South Jetty is 3 km (2 miles) from Jupiter. If you plan a vacation in South Florida, look for hotels and other accommodation in Jupiter. Jupiter has rooms for a wide range of budgets as well as car hire and transport links.
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