Surf Forecasts:
21st Street (Miami) surf forecast from 3 Sep 2026:
- Most powerful swell: Wednesday 9 Sep, 2PM (local time) - 3.5ft (1.1m), 8s period, NNE swell with 169 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 1.1m 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 0.2m 2s period and expected on Thursday (Sep 03) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Wed 9th Sep) | 3.5ft (1.1m) 8s |
Table - best surf conditions forecast for 21st Street (Miami) over the next 16 days.
The Lowdown
Alright folks, Rusty here. Gotta be straight with you – it’s looking like a pretty flat stretch ahead for the Miami area. Let's get into it.
Looking at the whole 16-day window, there’s nothing that gets the heart pumping. The first proper swell energy we see kicks in around the 9th of September, but even then, it’s not really offering anything rideable.
We start off with a long dry spell. From now right through until the 8th of September, the only break on the menu, 21st Street (Miami), is seeing tiny waves. We're talking ankle-snappers at best, with swell around 0.7 ft to 2 ft and combined wave energy barely registering, often below 20. The wind is mostly cross or cross-onshore, keeping things choppy and messy. Not worth getting the board wet.
Things try to change around Wednesday the 9th of September. The swell bumps up to 4 ft from the NE, and the combined energy jumps to 176. That’s a moderate pulse of energy, finally. But here’s the kicker – the wind is onshore and strong, blowing at 12-15 mph from the ENE. That’s going to turn any potential wave into a bumpy, blown-out mess. The "poor surf conditions" tag is spot on. This isn't a surf window; it’s a kite-surf window if you’re into that.
After that little spike, it settles back down. The rest of the period through to the 18th of September sees the swell dropping back under 3 ft, with energy levels mostly in the double digits. The wind stays mostly onshore or cross-onshore. There's no clean, glassy day in sight, and no standout session to aim for. For a spot like 21st Street that's already inconsistent, this kind of blank run is pretty normal for this time of year. Forecasts can change, but right now, there’s nothing to recommend.
Honestly, save the gas money for now, boys.
- Rusty
Short Range ForecastHeavy rain (total 20mm), heaviest during Wed night. Warm (max 30°C on Wed night, min 28°C on Fri morning). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 11mm), heaviest on Mon night. Warm (max 30°C on Sun afternoon, min 29°C on Sat night). Wind will be generally light. | ||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | ||||||||||||||
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 10 | E 9 | E 9 | E 9 | E 5 | ESE 4 | ESE 4 | ESE 4 | SE 4 | SE 4 | E 7 | ESE 3 | E 9 | E 8 | E 8 | E 8 | E 8 | NNE 8 | NNE 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 29 | 14 | 14 | 6 | 11 | 10 | 9 | 5 | 6 | 5 | 4 | 3 | 6 | 6 | 5 | 5 | 5 | 19 | 54 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross-on | cross-on | on | cross-on | on |
High Tide | 00:42AM0.84m | 1:37PM0.85m | 1:40AM0.81m | 2:44PM0.83m | 2:50AM0.79m | 3:57PM0.83m | 4:07AM0.80m | 5:09PM0.85m | 5:21AM0.84m | 6:12PM0.90m | 6:27AM0.89m | 7:06PM0.94m | |||||||
Low Tide | 7:07AM0.05m | 7:41PM0.23m | 8:09AM0.08m | 8:50PM0.25m | 9:21AM0.10m | 10:06PM0.25m | 10:35AM0.10m | 11:18PM0.21m | 11:45AM0.07m | 00:21AM0.16m | 12:45PM0.04m | 1:16AM0.09m | |||||||
 |  |  | | | | | |  |  | |  | | | | |  | |  | |
 | — | 7:01 | — | — | 7:01 | — | — | 7:01 | — | — | 7:01 | — | — | 7:01 | — | — | 7:03 | — | — |
 | 7:38 | — | 7:37 | — | — | 7:37 | — | — | 7:36 | — | — | 7:34 | — | — | 7:32 | — | — | 7:31 | — |
mm | 6 | — | 1 | 3 | 4 | 1 | 3 | 2 | — | — | — | 1 | 5 | 2 | — | 3 | — | — | — |
Temp °C | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 30 | 30 | 29 | 30 | 29 | 29 | 29 | 29 |
Feels °C | 34 | 34 | 32 | 31 | 32 | 32 | 31 | 33 | 32 | 32 | 34 | 32 | 33 | 33 | 32 | 31 | 32 | 31 | 29 |
Swell 1 Height (m) Direction Period (s) | E 10 | E 9 | E 9 | E 6 | E 5 | E 8 | E 8 | E 8 | E 8 | N 7 | E 3 | E 7 | E 9 | E 8 | E 8 | E 8 | E 8 | NNE 8 | NNE 7 |
| kJ | 29 | 14 | 14 | 6 | 11 | 5 | 5 | 1 | 1 | 1 | 1 | 1 | 6 | 6 | 5 | 5 | 5 | 19 | 54 |
Swell 2 Height (m) Direction Period (s) | NE 10 | NE 9 | NE 5 | E 9 | E 8 | NE 8 | NE 8 | E 8 | N 8 | N 7 | E 7 | NE 6 | NE 9 | — | NE 8 | NE 8 | NE 8 | E 8 | E 9 |
| kJ | 4 | 3 | 1 | 6 | 5 | 3 | 3 | 1 | 1 | 1 | 4 | 1 | 3 | — | 2 | 3 | 3 | 5 | 6 |
Swell 3 Height (m) Direction Period (s) | NE 4 | — | NE 9 | NE 9 | — | — | — | — | — | — | SSE 3 | E 10 | N 6 | NE 8 | — | NE 7 | — | — | NE 12 |
| kJ | 1 | — | 3 | 3 | — | — | — | — | — | — | 1 | 2 | 1 | 3 | — | 2 | — | — | 6 |
Wind waves Height (m) Direction Period (s) | — | — | SE 3 | — | — | ESE 4 | ESE 4 | ESE 4 | SE 4 | SE 4 | — | ESE 3 | SSE 4 | — | — | — | — | — | E 3 |
| kJ | — | — | 2 | — | — | 10 | 9 | 5 | 6 | 5 | — | 3 | 2 | — | — | — | — | — | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 925 | 845 | 845 | 213 | 232 | 1634 | 254 | 955 | 1634 | 1042 | 327 | 324 | 327 | 324 | 845 | 360 | 845 | 845 | 731 |
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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