Surf Forecasts:
21st Street (Miami) surf forecast from 2 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 11PM (local time) - 3ft (0.9m), 8s period, NNE swell with cross-offshore winds.
- Most powerful swell: Tuesday 8 Sep, 8PM (local time) - 3ft (0.9m), 8s period, NNE swell with 111 kJ wave energy.
- Next surfable swell (1★+): Tuesday 8 Sep, 11PM (local time) - 3ft (0.9m), 8s period with NNE swell.
Best Forecast Surf Conditions for 21st Street (Miami) this week:
The surf forecast for 21st Street (Miami) over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 08) at 11PM. The primary swell is predicted to be 0.9m and 8s period with a secondary swell of 0.1m and 8s. Another secondary swell of 0.2m and 2s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at 21st Street (Miami) in the next 16 days are 0.9m 8s and forecast to arrive on Tuesday (Sep 08) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 4s period and expected on Sunday (Sep 06) at 5AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Tue 8th Sep) | 3ft (0.9m) 8s |
| Best Surf | 11PM (Tue 8th Sep) | 3ft (0.9m) 8s |
| Most Powerful | 8PM (Tue 8th Sep) | 3ft (0.9m) 8s |
Table - best surf conditions forecast for 21st Street (Miami) over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s be straight with you. For the next 16 days, the outlook for 21st Street (Miami) is a flat, quiet stretch. The finder is showing zero recommendations, so we’re looking at a long, dry spell.
Right now, through the first week of September, the waves are tiny. We’re talking ankle to knee-high at best, with swell heights hovering around 0.7 ft to 2 ft. The combined wave energy is pathetic, barely registering in the double digits – numbers like 5, 19, 39, even 92 on the 8th of September, but that’s still just weak energy. The direction is mostly out of the east, with a short period around 4 to 10 seconds, meaning weak, windswell junk. No real power behind it.
The wind is a constant problem. It’s cross-shore or cross-onshore from the south to southeast, mostly 6 to 16 mph, keeping the surface choppy and messy. There’s a brief moment on the morning of Tuesday the 8th of September where it goes glassy, and the swell direction shifts to NNE, but the swell is still only 1 ft and the energy is just 21. It’s a tease. The water temperature is about average for the time of year, nothing weird going on.
The second week doesn’t get any better. From the 11th of September onwards, we’re looking at 0.7 ft to 2 ft waves with energy dropping back into the teens and single digits. The wind stays onshore or cross-shore, and the swell period is short. It’s a complete blank run. For an area like this, a long stretch of flat, poor surf is more normal than a surprise. It’s not looking interesting for anyone on a paddle board.
Hang tight, check back. Forecasts can change, but right now, there’s nothing to get excited about.
Rusty
Short Range ForecastModerate rain (total 14mm), heaviest on Wed night. Warm (max 30°C on Wed afternoon, min 28°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 16mm), heaviest on Sat night. Warm (max 31°C on Mon afternoon, min 28°C on Fri night). Wind will be generally light. | ||||||||||||||||||
Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | ||||||||||||||
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 11 | E 10 | E 10 | E 10 | E 9 | E 6 | E 5 | E 5 | E 5 | E 8 | E 4 | E 8 | E 8 | E 8 | SE 3 | E 9 | E 8 | E 8 | E 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 37 | 33 | 30 | 16 | 25 | 21 | 13 | 17 | 11 | 8 | 2 | 4 | 4 | 4 | 3 | 6 | 6 | 5 | 5 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross | cross-off | cross | cross-off | cross-off | cross | cross-off |
High Tide | 11:53PM0.87m | 12:39PM0.88m | 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 | |||||||
Low Tide | 6:13AM0.02m | 6:42PM0.19m | 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 | |||||||
 |  |  | |  |  |  | | | | | | | | | | | | | |
 | — | 7:00 | — | — | 7:01 | — | — | 7:01 | — | — | 7:01 | — | — | 7:01 | — | — | 7:01 | — | — |
 | 7:39 | — | 7:38 | — | — | 7:37 | — | — | 7:37 | — | — | 7:36 | — | — | 7:34 | — | — | 7:32 | — |
mm | 4 | 1 | 1 | 6 | — | — | — | 1 | 1 | 2 | 1 | 1 | 5 | 1 | — | 6 | — | — | 1 |
Temp °C | 29 | 29 | 30 | 30 | 29 | 30 | 29 | 29 | 29 | 29 | 29 | 30 | 29 | 29 | 30 | 30 | 29 | 31 | 31 |
Feels °C | 33 | 32 | 32 | 33 | 32 | 32 | 31 | 32 | 31 | 31 | 33 | 32 | 32 | 32 | 31 | 31 | 32 | 31 | 32 |
Swell 1 Height (m) Direction Period (s) | E 11 | E 10 | E 10 | E 10 | E 9 | E 9 | NE 4 | E 5 | E 8 | E 8 | E 4 | E 8 | E 8 | E 8 | E 7 | E 9 | E 8 | E 8 | E 8 |
| kJ | 37 | 33 | 30 | 16 | 25 | 14 | 3 | 17 | 5 | 5 | 2 | 4 | 4 | 4 | 1 | 6 | 6 | 5 | 5 |
Swell 2 Height (m) Direction Period (s) | NE 4 | NE 11 | NE 11 | ENE 10 | NE 5 | NE 9 | E 9 | E 8 | NE 8 | NE 8 | E 8 | — | — | SE 4 | E 10 | NE 9 | — | NE 8 | NE 9 |
| kJ | 1 | 5 | 4 | 9 | 7 | 3 | 6 | 5 | 3 | 3 | 1 | — | — | 1 | 2 | 3 | — | 2 | 3 |
Swell 3 Height (m) Direction Period (s) | NE 9 | NE 6 | NE 5 | — | NE 9 | NE 9 | NE 9 | NE 9 | SSE 3 | N 8 | E 5 | — | — | E 8 | NE 8 | — | NE 8 | NE 9 | N 8 |
| kJ | 3 | 1 | 1 | — | 3 | 3 | 3 | 3 | 1 | 1 | 1 | — | — | 1 | 2 | — | 3 | 3 | 1 |
Wind waves Height (m) Direction Period (s) | — | — | SSE 3 | SE 3 | — | E 6 | E 5 | — | E 5 | ESE 4 | SSE 4 | SE 3 | SSE 4 | — | SE 3 | S 3 | — | ESE 2 | — |
| kJ | — | — | 1 | 2 | — | 21 | 13 | — | 11 | 8 | 1 | 3 | 3 | — | 3 | 1 | — | 1 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 338 | 338 | 338 | 173 | 146 | 925 | 232 | 232 | 517 | 360 | 472 | 369 | 524 | 324 | 324 | 731 | 353 | 325 | 234 |
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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