Surf Forecasts:
21st Street (Miami) surf forecast from 5 Sep 2026:
- Most powerful swell: Wednesday 9 Sep, 11AM (local time) - 2.5ft (0.7m), 8s period, NNE swell with 62 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 0.7m 8s and forecast to arrive on Wednesday (Sep 09) at 11AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 4s period and expected on Saturday (Sep 05) at 11PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Wed 9th Sep) | 2.5ft (0.7m) 8s |
Table - best surf conditions forecast for 21st Street (Miami) over the next 16 days.
The Lowdown
Alright, Rusty here. Let's have a look at what's in store for the next couple of weeks.
Honestly, it’s a tough stretch ahead for 21st Street (Miami). We’re looking at a real flat spell to kick things off. The first solid recommendation doesn’t come until Wednesday the 18th of September. That’s a long gap with barely a ripple, so don’t get your hopes up for any quick fixes.
Starting Saturday the 5th, we’ve got tiny, weak energy (12) with a short-period easterly windswell of only 0.4ft and cross-shore winds. It’s poor, and it stays that way for days. Sunday the 6th has a moment of glassy conditions in the morning with next to no swell (energy a measly 6). It’s flat and clean, but there’s no wave to surf.
Monday the 7th through to Tuesday the 15th is more of the same: tiny waves that never crack 2ft, with onshore or cross-onshore winds. The water temp on the 5th is reading 87°F, which is a touch warmer than normal for this time of year, so at least it'll be a nice swim.
Now, there is a flicker of hope way down the line. On Wednesday the 18th of September, we finally see some energy. The swell jumps to 3ft from the NNE with a period of 9 seconds. The combined energy clocks in at a moderate 133. It’s not huge, but it’s the most we’ve seen. Problem is, the wind is onshore from the ENE at 12-16 mph. It’ll be lumpy. The same holds for Thursday the 19th and Friday the 20th. The swell holds around 2-3ft with moderate energy (109-133), but the wind stays onshore or cross-onshore. The beach break setup and these winds mean the waves will be messy. If you’re a beginner, those 2-3ft waves are fine size-wise, but the choppy conditions won’t be fun. Honestly, with these onshore winds and a beach setup, this window looks more interesting for a kite surfer than a paddle surfer.
So, the standout, if you can call it that, is the window from Wednesday the 18th to Friday the 20th. It’s the only period with any real push. The 3ft NNE swell on the 18th is the best on offer. It’s not perfect, but it’s something to look forward to. Just keep in mind, the long-range call is less certain. For now, I’d say keep your board in the car for the 18th and hope the wind eases off.
Rusty.
Short Range ForecastHeavy rain (total 56mm), heaviest during Sat night. Warm (max 30°C on Sat afternoon, min 26°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Tue night. Warm (max 30°C on Tue afternoon, min 28°C on Tue morning). Wind will be generally light. | ||||||||||||||||||||
Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | |||||||||||||||
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 4 | SSE 4 | E 8 | E 7 | E 10 | E 9 | E 8 | E 8 | E 8 | E 8 | E 8 | NNE 10 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NE 9 | NNE 8 | NE 8 | NE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 5 | 5 | 4 | 4 | 2 | 6 | 5 | 5 | 5 | 5 | 5 | 9 | 62 | 62 | 58 | 40 | 43 | 36 | 25 | 17 | 17 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | glassy | glassy | cross-on | cross-off | cross | cross-on | cross-on | cross-on | on | on | on | on | on | on | on | on | cross-on | cross-on | cross-on |
High Tide | 3:57PM0.83m | 4:07AM0.80m | 5:09PM0.85m | 5:21AM0.84m | 6:12PM0.90m | 6:27AM0.89m | 7:06PM0.94m | 7:24AM0.95m | 7:54PM0.98m | 8:15AM0.99m | 8:39PM1.00m | 9:02AM1.02m | 9:21PM1.00m | ||||||||
Low Tide | 9:21AM0.10m | 10:06PM0.25m | 10:35AM0.10m | 11:18PM0.21m | 11:45AM0.07m | 00:21AM0.16m | 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 | |||||||
 |  |  | |  | | | | | | | |  | |  | | | | | | | |
 | 7:01 | — | — | 7:01 | — | — | 7:01 | — | — | 7:03 | — | — | 7:03 | — | — | 7:03 | — | — | 7:03 | — | — |
 | — | 7:36 | — | — | 7:34 | — | — | 7:32 | — | — | 7:31 | — | — | 7:30 | — | — | 7:30 | — | — | 7:29 | — |
mm | 2 | 2 | 22 | 2 | — | 6 | 2 | — | 20 | — | — | 1 | — | — | — | — | — | — | — | — | 12 |
Temp °C | 29 | 30 | 28 | 29 | 30 | 30 | 29 | 30 | 28 | 29 | 30 | 30 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 30 | 29 |
Feels °C | 32 | 33 | 33 | 34 | 33 | 32 | 34 | 32 | 31 | 33 | 34 | 33 | 32 | 32 | 32 | 32 | 31 | 32 | 33 | 32 | 32 |
Swell 1 Height (m) Direction Period (s) | E 4 | E 4 | SSE 4 | SSE 3 | E 7 | E 9 | E 8 | E 8 | E 8 | E 8 | E 8 | NNE 10 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NE 9 | NNE 8 | NE 8 | NE 8 |
| kJ | 5 | 1 | 2 | 1 | 1 | 6 | 5 | 5 | 5 | 5 | 5 | 9 | 62 | 62 | 58 | 40 | 43 | 36 | 25 | 17 | 17 |
Swell 2 Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 7 | NE 6 | NE 9 | — | NE 9 | NE 8 | NE 10 | NE 11 | NNE 7 | E 8 | E 8 | SSE 5 | NNE 10 | SSE 4 | S 5 | SSE 4 | E 8 | E 7 |
| kJ | 1 | 1 | 4 | 4 | 1 | 3 | — | 3 | 3 | 4 | 5 | 5 | 5 | 5 | 2 | 10 | 2 | 2 | 1 | 4 | 4 |
Swell 3 Height (m) Direction Period (s) | E 8 | N 8 | NE 7 | NE 6 | E 10 | N 6 | NE 9 | NE 7 | N 10 | — | N 7 | E 8 | — | E 9 | E 8 | E 8 | E 8 | E 8 | E 8 | — | NE 8 |
| kJ | 1 | 1 | 2 | 2 | 2 | 1 | 3 | 2 | 2 | — | 1 | 5 | — | 2 | 5 | 1 | 5 | 1 | 5 | — | 3 |
Wind waves Height (m) Direction Period (s) | SSE 4 | SSE 4 | — | — | SE 2 | — | — | SE 2 | — | — | ESE 3 | E 3 | ESE 4 | E 4 | E 4 | ESE 4 | E 3 | SE 5 | — | SE 2 | SE 2 |
| kJ | 5 | 5 | — | — | 1 | — | — | 1 | — | — | 2 | 5 | 9 | 7 | 6 | 5 | 2 | 6 | — | 1 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 941 | 941 | 731 | 327 | 324 | 327 | 327 | 324 | 845 | 359 | 1634 | 294 | 232 | 338 | 326 | 229 | 292 | 232 | 146 | 324 | 692 |
Best forecast wave conditions in South Florida | |||||||||||||||||||||
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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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