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21st Street (Miami) Surf Forecast
/ Florida – South (39 breaks) / Florida (155 breaks) /
21st Street (Miami) surfForecast / Florida – South / USA
12 Day Weather and Surf, issued 7 am Sunday 17 Aug 2025 EDT
Best Forecast Surf Conditions for 21st Street (Miami) this week:
The surf forecast for 21st Street (Miami) over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 19) at 5AM. The primary swell is predicted to be 1.0m and 16s period with a secondary swell of 0.4m and 7s. Another secondary swell of 0.3m and 3s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at 21st Street (Miami) in the next 12 days are 1.2m 15s and forecast to arrive on Tuesday (Aug 19) at 11AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Friday (Aug 22) at 5AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Tue 19th Aug) | 3.5ft (1.0m) 16s |
| Best Surf | 5AM (Tue 19th Aug) | 3.5ft (1.0m) 16s |
| Most Powerful | 11AM (Tue 19th Aug) | 4ft (1.2m) 15s |
Table - best surf conditions forecast for 21st Street (Miami) over the next 12 days.
Short Range Forecast Light rain (total 9mm), mostly falling on Tue afternoon. Warm (max 31°C on Tue afternoon, min 28°C on Mon morning). Wind will be generally light. | Days 3-6 Weather Summary Moderate rain (total 12mm), heaviest on Fri night. Warm (max 33°C on Wed afternoon, min 25°C on Fri night). Mainly fresh winds. | ||||||||||||||||||||
Sunday 17 | Monday 18 | Tuesday 19 | Wednesday 20 | Thursday 21 | Friday 22 | Saturday 23 | |||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | |||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||
| Period(s) (?) | 9 | 9 | 16 | 13 | 13 | 16 | 15 | 14 | 14 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 |
Wave (?)Graph  | |||||||||||||||||||||
| Energy (?) | 11 | 12 | 36 | 71 | 145 | 422 | 762 | 671 | 511 | 342 | 493 | 557 | 446 | 429 | 384 | 286 | 265 | 217 | 208 | 206 | 179 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | on | cross- on | on | cross- on | cross- off | cross- on | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross- off | off | cross- on | glass | glass | cross- on | cross- on |
High Tide / height (m) | 4:06PM 0.80 | 4:10AM 0.75 | 5:16PM 0.81 | 5:21AM 0.77 | 6:20PM 0.83 | 6:27AM 0.80 | 7:15PM 0.87 | 7:24AM 0.83 | 8:04PM 0.89 | 8:15AM 0.86 | 8:47PM 0.91 | 9:02AM 0.88 | 9:27PM 0.91 | ||||||||
Low Tide / height (m) | 9:29AM 0.02 | 10:12PM 0.20 | 10:40AM 0.02 | 11:24PM 0.19 | 11:47AM 0.02 | 12:28AM 0.15 | 12:48PM 0.00 | 1:24AM 0.11 | 1:41PM -0.01 | 2:12AM 0.07 | 2:29PM -0.02 | 2:56AM 0.04 | 3:13PM -0.01 | 3:37AM 0.03 | |||||||
Sunday 17 | Monday 18 | Tuesday 19 | Wednesday 20 | Thursday 21 | Friday 22 | Saturday 23 | |||||||||||||||
| Sunrise | 6:54 | - | - | 6:54 | - | - | 6:54 | - | - | 6:54 | - | - | 6:54 | - | - | 6:56 | - | - | 6:56 | - | - |
| Sunset | - | 7:53 | - | - | 7:52 | - | - | 7:52 | - | - | 7:52 | - | - | 7:51 | - | - | 7:50 | - | - | 7:49 | - |
 | |  | | |  | |  | | | | | |  | | | |  | | | | |
Rain (mm) | - | - | - | - | - | 1 | - | 4 | 4 | - | - | - | - | - | 3 | - | - | 9 | - | - | 2 |
| Temp. °C | 29 | 29 | 29 | 29 | 30 | 29 | 30 | 31 | 30 | 30 | 33 | 32 | 30 | 31 | 29 | 30 | 31 | 28 | 29 | 30 | 30 |
| Feels °C (?) | 32 | 31 | 31 | 33 | 32 | 31 | 31 | 33 | 32 | 30 | 34 | 33 | 32 | 31 | 28 | 33 | 32 | 30 | 31 | 31 | 31 |
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for Florida - South
The wind is still cross-on at 21st Street (Miami) (light winds from the SE at BUOY-VAKF1 8 km from 21st Street (Miami)). 0.2m 3s local chop from the N with a 0.2m 3s local chop from the E. 2 swells combining to make bigger set waves.
Actual: 56 min ago
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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 12 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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