Surf Forecasts:
21st Street (Miami) surf forecast from 6 Sep 2026:
- Most powerful swell: Wednesday 9 Sep, 2PM (local time) - 2.5ft (0.7m), 8s period, NE swell with 72 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 2PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 3s period and expected on Monday (Sep 07) at 11PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (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 talk about what's on offer in Miami. Look, I gotta be straight with you – we're looking at a long dry spell. For the next 16 days, starting now and running all the way through to Monday the 21st of September, this forecast is a tough one. Every single morning and afternoon window comes back as poor surf conditions. We're talking a solid three weeks with nothing worthwhile to paddle out for. The energy just isn't there. The first record we have shows a tiny 0.7ft swell from the east on the morning of Sunday, the 6th, but with a risk of thunderstorms and only a combined wave energy of (6), it's just not surfable. That weak pattern just keeps repeating. We see a slight bump on Wednesday the 9th with 2ft from the NNE and NE, and that combined energy climbs to (71) and (82), but the winds are onshore, making it choppy and messy. The water temperature is about 87°, which is a touch warmer than usual for this time of year, but warm water doesn't make waves. For beginners, anything over 5ft is too much, but we never even get close to that. For experts, you need over 8ft to get excited, which is a world away from what we're seeing. The small swells we do get have periods all over the place, mostly under 8 seconds, which is just weak windswell with no grunt. With the consistent onshore and cross-onshore winds and the beach break setup, honestly, this stretch is looking more interesting for kite surfing than paddle surfing. It's a blank run, but that's not unusual for this area when the trades set in. Don't hang your hopes on it. There are no standouts, no hidden gems. It's just a waiting game. Hang loose and wait for the next window.
Rusty.
Short Range ForecastHeavy rain (total 45mm), heaviest during Mon night. Warm (max 31°C on Sun afternoon, min 24°C on Mon night). Mainly strong winds. | Days 4-6 Weather SummaryHeavy rain (total 22mm), heaviest during Fri morning. Warm (max 30°C on Wed afternoon, min 29°C on Wed morning). Wind will be generally light. | ||||||||||||||||||||
Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | |||||||||||||||
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 7 | E 10 | E 9 | E 8 | E 8 | E 8 | E 8 | E 8 | NNE 7 | NNE 9 | NE 8 | NE 8 | NNE 8 | NNE 8 | NE 8 | NE 7 | NE 7 | NE 7 | NNE 7 | E 8 | ESE 4 |
Wave Graph  | |||||||||||||||||||||
 kJ | 4 | 2 | 6 | 5 | 5 | 5 | 5 | 5 | 25 | 54 | 70 | 70 | 55 | 41 | 28 | 14 | 14 | 7 | 5 | 4 | 13 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-off | off | cross | glassy | glassy | cross-on | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | on | cross-on |
High Tide | 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 | 9:47AM1.02m | 10:00PM0.98m | ||||||||
Low Tide | 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 | 3:55PM0.05m | 4:13AM0.00m | |||||||
 | |  | |  | |  | |  | | | | | | | | | | | | | |
 | 7:01 | — | — | 7:01 | — | — | 7:03 | — | — | 7:03 | — | — | 7:03 | — | — | 7:03 | — | — | 7:03 | — | — |
 | — | 7:34 | — | — | 7:32 | — | — | 7:31 | — | — | 7:30 | — | — | 7:30 | — | — | 7:29 | — | — | 7:28 | — |
mm | 2 | 1 | 12 | 4 | — | 20 | — | — | 6 | — | — | 4 | 1 | — | 4 | 5 | — | 8 | 4 | 1 | 10 |
Temp °C | 30 | 31 | 31 | 30 | 31 | 28 | 29 | 30 | 30 | 29 | 30 | 29 | 29 | 30 | 29 | 29 | 30 | 30 | 29 | 30 | 30 |
Feels °C | 34 | 34 | 34 | 34 | 33 | 31 | 33 | 32 | 32 | 32 | 33 | 32 | 31 | 32 | 32 | 31 | 33 | 33 | 30 | 33 | 32 |
Swell 1 Height (m) Direction Period (s) | E 7 | E 7 | E 9 | E 8 | E 8 | S 3 | NE 10 | E 8 | NNE 7 | NNE 9 | NE 8 | NE 8 | NNE 8 | NNE 8 | NE 8 | NE 7 | NE 7 | NE 7 | NNE 7 | E 8 | NE 6 |
| kJ | 4 | 1 | 6 | 5 | 5 | 1 | 4 | 5 | 25 | 54 | 70 | 70 | 55 | 41 | 28 | 14 | 14 | 7 | 5 | 4 | 2 |
Swell 2 Height (m) Direction Period (s) | — | NE 6 | NE 9 | NE 9 | NE 9 | E 8 | E 8 | NE 11 | E 8 | NE 6 | E 8 | E 8 | E 8 | E 8 | SSE 5 | E 4 | E 7 | E 7 | E 7 | NE 6 | NE 8 |
| kJ | — | 1 | 3 | 3 | 3 | 5 | 5 | 4 | 5 | 9 | 5 | 5 | 5 | 5 | 5 | 2 | 4 | 4 | 4 | 2 | 3 |
Swell 3 Height (m) Direction Period (s) | NE 6 | E 10 | N 6 | — | N 7 | NE 10 | — | NE 8 | NE 10 | E 8 | E 8 | — | — | E 8 | E 8 | E 7 | E 8 | E 8 | N 9 | N 9 | N 8 |
| kJ | 2 | 2 | 1 | — | 1 | 4 | — | 2 | 4 | 5 | 5 | — | — | 5 | 1 | 4 | 1 | 1 | 2 | 2 | 1 |
Wind waves Height (m) Direction Period (s) | — | SE 2 | — | — | SSE 3 | SSW 3 | — | ESE 2 | — | ESE 3 | ESE 3 | ESE 3 | ESE 4 | SE 4 | SE 5 | SSE 4 | ESE 3 | SE 3 | SE 3 | ESE 3 | ESE 4 |
| kJ | — | 1 | — | — | 3 | 1 | — | 1 | — | 3 | 2 | 3 | 6 | 7 | 8 | 3 | 4 | 1 | 4 | 4 | 13 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 327 | 353 | 375 | 324 | 325 | 353 | 234 | 324 | 273 | 845 | 338 | 731 | 222 | 1560 | 213 | 234 | 731 | 991 | 862 | 1634 | 500 |
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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