Surf Forecasts:
21st Street (Miami) surf forecast from 26 Aug 2026:
- Most powerful swell: Tuesday 1 Sep, 5AM (local time) - 3ft (0.9m), 5s period, E swell with 34 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 0.9m 5s and forecast to arrive on Tuesday (Sep 01) at 5AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 4s period and expected on Wednesday (Aug 26) at 11PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5AM (Tue 1st Sep) | 3ft (0.9m) 5s |
Table - best surf conditions forecast for 21st Street (Miami) over the next 16 days.
The Lowdown
Alright, surfers, Rusty here. Let's be straight with you: this 16-day window for our Miami area is a tough one. We've got a long stretch of nothing special, so don't be in a rush.
For the first spot, we're looking at 21st Street (Miami). The water temp is sitting at 87°, which is a touch warmer than normal for this time of year.
The outlook kicks off on Wednesday, August 26th, and honestly, it's a write-off. We've got a tiny 2ft swell from the SE with a pathetic 4-second period, so it's choppy and weak with cross-onshore winds at 15 mph. That's no good.
The rest of August and the first week of September are a total bust. The swell is tiny, the period is short, and the winds are mostly onshore or cross-onshore. You'll see a couple of days where the wind goes clean offshore (like the 6th and 7th of September), but the swell is just too small and weak to do anything with. It's a frustrating gap of about 10 days with no real surf.
Now, the only glimmer of hope comes on Wednesday, September 9th. The morning shows a 2ft swell from the NNE with a period of 11 seconds. That's a long-period groundswell, which brings better shape. The wind is a light cross-offshore from the SW at 9 mph, keeping things clean. The combined energy is moderate (92). It's not a standout by any stretch, but it's the only window where the conditions are clean enough to paddle out for a few fun, small waves. The afternoon gets gusty, so get it early.
After that, it's back to small, average conditions through to the 10th. The whole run is a "poor" situation, so don't expect much.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Thu night. Warm (max 30°C on Wed afternoon, min 28°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Sat night. Warm (max 30°C on Sat afternoon, min 29°C on Sat night). Wind will be generally light. | |||||||||||||||||||
Wed 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | ||||||||||||||
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) | SE 4 | SE 4 | SE 4 | SE 4 | ESE 4 | ESE 4 | E 9 | E 4 | E 4 | E 4 | E 3 | ESE 4 | E 8 | E 4 | E 4 | E 4 | E 4 | E 4 | ENE 4 | ENE 4 |
Wave Graph  | ||||||||||||||||||||
 kJ | 14 | 6 | 9 | 10 | 11 | 11 | 6 | 6 | 7 | 7 | 8 | 12 | 5 | 14 | 11 | 7 | 30 | 20 | 14 | 34 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | on | on | on | on | on | on | on | on | on | on |
High Tide | 8:12PM0.85m | 8:22AM0.84m | 8:47PM0.87m | 9:01AM0.87m | 9:22PM0.89m | 9:40AM0.91m | 9:57PM0.90m | 10:20AM0.92m | 10:32PM0.90m | 11:02AM0.92m | 11:11PM0.89m | 11:48AM0.91m | 11:53PM0.87m | |||||||
Low Tide | 2:19AM0.12m | 2:33PM0.05m | 2:55AM0.08m | 3:11PM0.05m | 3:31AM0.05m | 3:49PM0.05m | 4:07AM0.02m | 4:28PM0.07m | 4:45AM0.01m | 5:09PM0.10m | 5:27AM0.01m | 5:53PM0.14m | ||||||||
 |  | | |  |  | |  |  | | | | | | | | | | | | |
 | — | — | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — | 7:00 | — | — | 7:00 | — | — |
 | 7:45 | — | — | 7:45 | — | — | 7:44 | — | — | 7:43 | — | — | 7:42 | — | — | 7:40 | — | — | 7:39 | — |
mm | 1 | 1 | 1 | 2 | 3 | — | — | — | — | 1 | 3 | — | — | — | — | — | — | — | — | — |
Temp °C | 30 | 29 | 29 | 30 | 29 | 29 | 30 | 29 | 29 | 30 | 30 | 29 | 30 | 29 | 29 | 30 | 29 | 29 | 30 | 29 |
Feels °C | 31 | 30 | 31 | 32 | 31 | 31 | 33 | 31 | 31 | 32 | 32 | 31 | 33 | 30 | 32 | 33 | 30 | 31 | 32 | 30 |
Swell 1 Height (m) Direction Period (s) | E 10 | E 9 | E 8 | E 8 | E 8 | E 9 | SSE 4 | SSE 5 | E 8 | E 8 | NE 11 | E 8 | SE 4 | SSE 5 | E 8 | E 8 | NE 9 | E 7 | E 7 | E 12 |
| kJ | 2 | 2 | 1 | 1 | 1 | 6 | 1 | 2 | 5 | 5 | 5 | 5 | 4 | 2 | 5 | 5 | 3 | 4 | 4 | 11 |
Swell 2 Height (m) Direction Period (s) | E 8 | NE 9 | NE 8 | NE 8 | NE 14 | NE 9 | E 9 | E 8 | NE 11 | NE 11 | NE 8 | NE 10 | E 8 | NE 10 | NE 10 | SSE 4 | S 5 | NE 9 | — | NE 9 |
| kJ | 1 | 3 | 3 | 3 | 7 | 3 | 6 | 5 | 5 | 5 | 2 | 4 | 5 | 4 | 4 | 2 | 1 | 3 | — | 3 |
Swell 3 Height (m) Direction Period (s) | — | — | NE 15 | NE 15 | NE 8 | NE 13 | NE 9 | NE 12 | NE 8 | NE 8 | — | — | NE 10 | — | — | NE 9 | — | E 13 | NE 9 | NE 12 |
| kJ | — | — | 9 | 8 | 3 | 7 | 3 | 6 | 3 | 3 | — | — | 4 | — | — | 3 | — | 4 | 3 | 6 |
Wind waves Height (m) Direction Period (s) | SE 4 | SE 4 | SE 4 | SE 4 | ESE 4 | ESE 4 | E 4 | E 4 | E 4 | E 4 | E 3 | ESE 4 | ENE 4 | E 4 | E 4 | E 4 | E 4 | E 4 | ENE 4 | ENE 4 |
| kJ | 14 | 6 | 7 | 10 | 11 | 11 | 4 | 6 | 7 | 7 | 8 | 12 | 5 | 14 | 11 | 7 | 30 | 20 | 14 | 34 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1634 | 448 | 915 | 1634 | 234 | 232 | 991 | 360 | 338 | 1137 | 1149 | 862 | 1642 | 731 | 731 | 731 | 738 | 941 | 943 | 448 |
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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