Surf Forecasts:
21st Street (Miami) surf forecast from 8 Sep 2026:
- Most powerful swell: Wednesday 9 Sep, 2PM (local time) - 2.5ft (0.8m), 8s period, NNE swell with 78 kJ wave energy.
Best Forecast Surf Conditions for 21st Street (Miami) this week:
The most powerful waves expected at 21st Street (Miami) in the next 16 days are 0.8m 8s and forecast to arrive on Wednesday (Sep 09) at 2PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 5s period and expected on Sunday (Sep 13) at 11AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Wed 9th Sep) | 2.5ft (0.8m) 8s |
Table - best surf conditions forecast for 21st Street (Miami) over the next 16 days.
The Lowdown
Alright, this is Rusty, and I’m looking at the 16-day picture for 21st Street (Miami). Let’s be straight with each other – it’s a pretty flat stretch ahead, and there’s really nothing here to get excited about for paddle surfing. The water temperature is sitting at 31°C, which is a touch warmer than normal for this time of year.
The whole first week, starting Tuesday September 8th through the weekend, is a total write-off. We’re talking tiny dribbles of swell, mostly under 3 ft, with short, weak periods of 4 to 8 seconds. The wave energy is low – in the teens and twenties most days – and the winds are mostly onshore or cross-onshore, making for choppy, gutless surf. The reports all say “poor surf conditions,” and I’m not arguing. This stretch isn’t worth paddling out for.
There’s a bit of a lull, then heading into the second week – around Monday September 14th – it’s still flat. Not until Monday September 21st and Tuesday September 22nd does the combined energy finally bump up into the triple digits, hitting 213 and 144 respectively. The swell jumps to around 4 ft from the NNE with a period of 9 seconds. That’s the only real spike in the whole outlook. The catch? Winds are strong onshore at 18 to 22 mph, which is going to turn that into a messy, blown-out wall. At 4 ft, it’s not big enough to be dangerous, but with that wind and a beach break setup, it’s way more interesting for kite surfing than trying to paddle. The crowds are noted as “often” at this break, but honestly, for these conditions, I doubt many will bother.
So yeah, nothing to recommend here. This is one of those periods where Miami just doesn’t deliver. Forecasts can change, but as it stands, leave the board at home.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Tue morning. Warm (max 30°C on Tue afternoon, min 28°C on Tue morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Sat night. Warm (max 30°C on Fri afternoon, min 29°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | |||||||||||||||
AM | 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) | E 8 | E 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NE 7 | NE 7 | SE 4 | ESE 4 | ESE 4 | E 4 | ESE 4 | E 5 | E 4 | E 4 | E 4 | E 4 | ENE 4 |
Wave Graph  | |||||||||||||||||||||
 kJ | 5 | 5 | 19 | 64 | 76 | 58 | 52 | 37 | 24 | 14 | 10 | 11 | 14 | 7 | 25 | 11 | 12 | 10 | 7 | 6 | 29 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | on | cross-on | on | on | on |
High Tide | 7:06PM0.94m | 7:24AM0.95m | 7:54PM0.98m | 8:15AM0.99m | 8:39PM1.00m | 9:02AM1.02m | 9:21PM1.00m | 9:47AM1.02m | 10:00PM0.98m | 10:29AM1.00m | 10:38PM0.95m | 11:11AM0.96m | 11:16PM0.91m | ||||||||
Low Tide | 12:45PM0.04m | 1:16AM0.09m | 1:39PM0.02m | 2:05AM0.04m | 2:28PM0.01m | 2:50AM0.01m | 3:13PM0.02m | 3:32AM-0.01m | 3:55PM0.05m | 4:13AM0.00m | 4:36PM0.10m | 4:52AM0.03m | 5:16PM0.16m | ||||||||
 |  |  |  |  | | | |  | | |  | | |  | | | | | | | |
 | 7:03 | — | — | 7:03 | — | — | 7:03 | — | — | 7:03 | — | — | 7:03 | — | — | 7:05 | — | — | 7:05 | — | — |
 | — | 7:31 | — | — | 7:30 | — | — | 7:30 | — | — | 7:29 | — | — | 7:28 | — | — | 7:27 | — | — | 7:25 | — |
mm | 6 | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | 3 | — | — | — | — | — | 1 |
Temp °C | 29 | 30 | 30 | 29 | 30 | 29 | 30 | 30 | 29 | 29 | 30 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 |
Feels °C | 34 | 32 | 33 | 31 | 33 | 31 | 33 | 33 | 32 | 32 | 32 | 31 | 32 | 31 | 30 | 31 | 31 | 31 | 32 | 30 | 30 |
Swell 1 Height (m) Direction Period (s) | NE 10 | NE 11 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NE 7 | NE 7 | NE 7 | NNE 7 | NE 6 | SSE 4 | E 9 | SSE 5 | S 6 | SSE 5 | SSE 4 | SSE 4 | S 4 |
| kJ | 4 | 4 | 19 | 64 | 76 | 58 | 52 | 37 | 24 | 12 | 7 | 4 | 2 | 3 | 6 | 30 | 24 | 5 | 3 | 2 | 2 |
Swell 2 Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 7 | E 7 | NE 9 | E 8 | E 8 | NE 8 | E 5 | E 9 | E 9 | E 9 | E 9 | NE 11 |
| kJ | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 1 | 1 | 4 | 4 | 3 | 5 | 5 | 3 | 11 | 6 | 6 | 6 | 6 | 4 |
Swell 3 Height (m) Direction Period (s) | — | — | NE 10 | — | E 8 | — | — | E 8 | — | NE 10 | NE 10 | — | NE 9 | NE 6 | — | E 9 | NE 9 | NE 9 | NE 9 | NE 9 | N 11 |
| kJ | — | — | 4 | — | 5 | — | — | 5 | — | 4 | 4 | — | 3 | 1 | — | 6 | 3 | 3 | 3 | 3 | 2 |
Wind waves Height (m) Direction Period (s) | — | — | ESE 2 | ESE 3 | ESE 3 | E 4 | ESE 4 | ESE 4 | ESE 4 | SE 4 | SE 4 | ESE 4 | ESE 4 | E 4 | ESE 4 | — | E 4 | E 4 | E 4 | E 4 | ENE 4 |
| kJ | — | — | 1 | 4 | 5 | 10 | 8 | 16 | 19 | 14 | 10 | 11 | 14 | 7 | 25 | — | 12 | 10 | 7 | 6 | 29 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 359 | 232 | 222 | 845 | 1634 | 338 | 326 | 1562 | 232 | 234 | 731 | 234 | 731 | 1634 | 326 | 360 | 1330 | 360 | 360 | 1293 | 360 |
Best forecast wave conditions in South Florida | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the 21st Street (Miami) Surf forecast
The above surf forecast table for 21st Street (Miami) provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at 21st Street (Miami) can be found by selecting the local surf guide option on the grey menu. Our 21st Street (Miami) 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 (21st Street (Miami)) 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 21st Street (Miami) 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.
21st Street (Miami) is 1 km (1 miles) from the city of Miami Beach. If you plan a vacation in South Florida, look for hotels and other accommodation in Miami Beach. Miami Beach has rooms for a wide range of budgets as well as car hire and transport links.
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