Surf Forecasts:
21st Street (Miami) surf forecast from 9 Sep 2026:
- Most powerful swell: Wednesday 16 Sep, 2AM (local time) - 4ft (1.2m), 5s period, ENE swell with 67 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 1.2m 5s and forecast to arrive on Wednesday (Sep 16) at 2AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 5s period and expected on Sunday (Sep 13) at 2PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Wed 16th Sep) | 4ft (1.2m) 5s |
Table - best surf conditions forecast for 21st Street (Miami) over the next 16 days.
The Lowdown
Hey crew, Rusty here. I’m not going to sugarcoat it. 21st Street (Miami) is looking like a lake for the next couple of weeks. The whole period is a write-off for surfing. We have no solid swell, and the winds are all wrong. Water temp is about 87°F, which is a touch warmer than average for the season, but you won’t be needing a wetsuit for the conditions we have.
Right now, through Wednesday and Thursday, the swell is a pathetic 2ft to 2ft, with a period of just 8 seconds. That’s short-period windswell, and the energy is weak, with readings in the 60s. Winds are onshore or cross-onshore from the ESE. It’s just pure chop. The surf quality is poor, and it’s not changing anytime soon.
From Friday the 11th through the 20th, it’s even worse. We’re talking swells down to 0.7ft to 1ft, periods as low as 4 seconds, and low energy readings. This is a stretch of several days with absolutely no surf on the menu. It’s a dead zone.
We see a tiny bump around the 21st and 22nd. The swell might get up to 2ft, and then on the afternoon of the 22nd, the biggest wave of the period shows up at 4ft out of the ENE. But even that, with a period of just 5 seconds, is going to be nothing but lumpy, cross-onshore junk. The energy readings are moderate, in the 60s and 70s, but the quality is still poor. It’s not worth the paddle.
Look, this entire forecast is a dud. With the onshore winds and the lack of any real swell, this setup is far more interesting for kite surfing than paddle surfing. There are no standouts. Not one. This is just a normal, flat, and frustrating run for this area. Keep your boards in the car, and maybe we'll get lucky with a late-season change. But as it stands, don't get your hopes up.
Rusty.
Short Range ForecastModerate rain (total 12mm), heaviest on Thu night. Warm (max 30°C on Thu afternoon, min 29°C on Wed morning). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 15mm), heaviest on Sat night. Warm (max 30°C on Sat afternoon, min 28°C on Mon morning). Wind will be generally light. | ||||||||||||||||||||
Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | |||||||||||||||
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) | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 7 | NE 7 | NE 6 | SE 4 | ESE 4 | ESE 4 | ESE 4 | ESE 4 | SE 4 | E 9 | E 4 | E 4 | E 4 | E 4 | E 5 | ENE 4 | ENE 5 |
Wave Graph  | |||||||||||||||||||||
 kJ | 62 | 59 | 54 | 51 | 37 | 24 | 11 | 10 | 10 | 15 | 11 | 19 | 19 | 6 | 6 | 10 | 10 | 30 | 34 | 22 | 67 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | cross-on | cross-on | on | cross-on | on | cross-on | on | on | cross-on | cross-on | on | on | on | on | on | on | cross-on | on |
High Tide | 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 | 11:54AM0.91m | 11:55PM0.85m | ||||||||
Low Tide | 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 | 5:32AM0.08m | 5:58PM0.22m | ||||||||
 |  |  |  |  |  | |  |  | | | | | | | | | | | | | |
 | 7:03 | — | — | 7:03 | — | — | 7:03 | — | — | 7:03 | — | — | 7:05 | — | — | 7:05 | — | — | 7:05 | — | — |
 | — | 7:30 | — | — | 7:30 | — | — | 7:29 | — | — | 7:28 | — | — | 7:27 | — | — | 7:25 | — | — | 7:24 | — |
mm | 1 | — | — | 2 | — | 7 | — | — | 2 | — | 1 | 13 | — | — | 1 | — | — | — | — | 3 | 1 |
Temp °C | 29 | 29 | 29 | 29 | 30 | 29 | 29 | 30 | 29 | 29 | 30 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 |
Feels °C | 30 | 31 | 31 | 31 | 33 | 31 | 32 | 33 | 31 | 31 | 32 | 30 | 31 | 31 | 31 | 31 | 31 | 29 | 30 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 7 | NE 7 | NE 6 | NE 6 | NNE 6 | NE 6 | E 8 | E 8 | E 9 | SSE 5 | SSE 5 | E 9 | E 8 | — | E 8 | SSE 4 | NE 10 |
| kJ | 62 | 59 | 54 | 51 | 37 | 24 | 11 | 6 | 4 | 1 | 5 | 6 | 6 | 16 | 4 | 6 | 6 | — | 6 | 2 | 4 |
Swell 2 Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 7 | E 7 | NE 9 | E 8 | NE 6 | NE 8 | NE 8 | E 9 | E 9 | NE 9 | NE 9 | NE 11 | NE 10 | E 9 | — |
| kJ | 5 | 5 | 1 | 1 | 5 | 5 | 4 | 4 | 3 | 5 | 1 | 3 | 3 | 6 | 6 | 3 | 3 | 4 | 4 | 6 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | NE 10 | NE 8 | — | NE 9 | NE 9 | — | — | NE 9 | NE 9 | — | — | — | — | NE 10 | S 6 |
| kJ | — | — | — | — | — | — | 4 | 2 | — | 3 | 3 | — | — | 3 | 3 | — | — | — | — | 4 | 1 |
Wind waves Height (m) Direction Period (s) | ESE 3 | ESE 3 | E 4 | ESE 4 | ESE 4 | SE 4 | ESE 4 | SE 4 | ESE 4 | ESE 4 | ESE 4 | ESE 4 | SE 4 | E 4 | E 4 | E 4 | E 4 | E 4 | E 5 | ENE 4 | ENE 5 |
| kJ | 2 | 4 | 10 | 14 | 11 | 16 | 11 | 10 | 10 | 15 | 11 | 19 | 19 | 5 | 6 | 10 | 10 | 30 | 34 | 22 | 67 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 845 | 845 | 338 | 517 | 731 | 92 | 448 | 731 | 472 | 338 | 1650 | 448 | 448 | 1459 | 360 | 448 | 1171 | 448 | 1137 | 1635 | 421 |
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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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