Surf Forecasts:
21st Street (Miami) surf forecast from 23 Aug 2026:
- Most powerful swell: Sunday 30 Aug, 2AM (local time) - 2.5ft (0.8m), 4s period, E swell with 22 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 0.8m 4s and forecast to arrive on Sunday (Aug 30) 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 0.4m 4s period and expected on Sunday (Aug 30) at 5PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Sun 30th Aug) | 2.5ft (0.8m) 4s |
Table - best surf conditions forecast for 21st Street (Miami) over the next 16 days.
Short Range ForecastModerate rain (total 13mm), heaviest on Sun night. Warm (max 30°C on Sun afternoon, min 27°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 7mm), mostly falling on Wed afternoon. Warm (max 29°C on Wed afternoon, min 29°C on Wed afternoon). Wind will be generally light. | |||||||||||||||||||
Sun 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | ||||||||||||||
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 3 | E 12 | E 4 | SE 3 | SE 3 | SE 4 | SE 3 | ESE 3 | ESE 4 | SE 4 | ESE 4 | ESE 4 | E 4 | E 3 | E 4 | E 4 | E 4 | E 4 | E 4 | E 4 |
Wave Graph  | ||||||||||||||||||||
 kJ | 5 | 4 | 3 | 3 | 3 | 3 | 3 | 6 | 11 | 7 | 12 | 12 | 5 | 7 | 8 | 6 | 15 | 12 | 12 | 22 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | on | cross-on | on | cross-on | on | cross-on | cross-on | cross-on | on | on | on | on | on | on | cross-on | on |
High Tide | 6:09PM0.74m | 6:07AM0.69m | 6:55PM0.77m | 6:56AM0.73m | 7:35PM0.81m | 7:41AM0.79m | 8:12PM0.85m | 8:22AM0.84m | 8:47PM0.87m | 9:01AM0.87m | 9:22PM0.89m | 9:40AM0.91m | 9:57PM0.90m | |||||||
Low Tide | 00:16AM0.26m | 12:25PM0.13m | 1:02AM0.22m | 1:11PM0.10m | 1:42AM0.17m | 1:54PM0.07m | 2:19AM0.12m | 2:33PM0.05m | 2:55AM0.08m | 3:11PM0.05m | 3:31AM0.05m | 3:49PM0.05m | 4:07AM0.02m | |||||||
 |  |  |  |  | | |  | | | | | | | | | | | | | |
 | — | — | 6:56 | — | — | 6:56 | — | — | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — |
 | 7:49 | — | — | 7:47 | — | — | 7:46 | — | — | 7:45 | — | — | 7:45 | — | — | 7:44 | — | — | 7:43 | — |
mm | — | 7 | 1 | — | — | 1 | — | 2 | 2 | 2 | 2 | — | — | 1 | — | 2 | — | — | 1 | — |
Temp °C | 30 | 29 | 29 | 30 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 |
Feels °C | 32 | 31 | 32 | 32 | 30 | 33 | 32 | 30 | 32 | 32 | 32 | 32 | 31 | 30 | 32 | 31 | 31 | 31 | 31 | 30 |
Swell 1 Height (m) Direction Period (s) | E 8 | E 8 | E 4 | E 8 | E 8 | E 8 | E 8 | E 7 | E 8 | E 7 | NE 9 | E 8 | SSE 4 | SSE 4 | E 9 | E 9 | E 8 | E 8 | E 8 | E 8 |
| kJ | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 3 | 1 | 4 | 2 | 6 | 6 | 5 | 5 | 5 | 5 |
Swell 2 Height (m) Direction Period (s) | NE 9 | NE 8 | E 8 | NE 8 | NE 8 | N 7 | NE 8 | NE 8 | — | E 10 | — | NE 8 | E 8 | E 8 | NE 9 | NE 9 | NE 12 | NE 11 | NE 11 | NE 11 |
| kJ | 3 | 3 | 1 | 3 | 2 | 1 | 2 | 2 | — | 2 | — | 3 | 1 | 1 | 3 | 3 | 6 | 5 | 5 | 5 |
Swell 3 Height (m) Direction Period (s) | E 12 | E 12 | NE 8 | E 11 | E 11 | NE 8 | N 7 | E 10 | — | E 8 | — | NE 15 | NE 8 | NE 14 | NE 13 | NE 12 | — | NE 8 | NE 8 | — |
| kJ | 3 | 3 | 3 | 2 | 2 | 2 | 1 | 2 | — | 1 | — | 9 | 3 | 7 | 7 | 6 | — | 3 | 3 | — |
Wind waves Height (m) Direction Period (s) | SE 3 | SSE 3 | SSE 3 | SE 3 | SE 3 | SE 4 | SE 3 | ESE 3 | ESE 4 | SE 4 | ESE 4 | ESE 4 | E 4 | E 3 | E 4 | E 4 | E 4 | E 4 | E 4 | E 4 |
| kJ | 5 | 4 | 1 | 2 | 3 | 3 | 3 | 6 | 11 | 7 | 12 | 12 | 5 | 6 | 8 | 6 | 15 | 12 | 12 | 22 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 232 | 1149 | 865 | 1634 | 256 | 731 | 1131 | 448 | 731 | 1634 | 448 | 1171 | 1137 | 234 | 253 | 338 | 360 | 862 | 731 | 1149 |
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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