Surf Forecasts:
21st Street (Miami) surf forecast from 8 Aug 2026:
- Most powerful swell: Saturday 8 Aug, 11PM (local time) - 2.5ft (0.7m), 8s period, E swell with 64 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 Saturday (Aug 08) at 11PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 5s period and expected on Monday (Aug 10) at 2PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Sat 8th Aug) | 2.5ft (0.7m) 8s |
Table - best surf conditions forecast for 21st Street (Miami) over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s be straight with you right off the bat: the outlook for the next 16 days at 21st Street (Miami) is a tough one. We’re looking at a long, drawn-out stretch of flat, messy conditions with nothing to get excited about.
From the start of the period on Saturday, August 8th, right through to the end, it’s a total write-off. The swell is tiny, mostly ranging from 0.3ft to 3ft, with a weak combined swell energy barely cracking 60 (60) at its best. The period is short and choppy, with waves coming from the east and southeast. To make matters worse, the wind is almost always a cross-onshore breeze, blowing at 9 to 12 mph, leaving the surface a mess. It’s the kind of setup that looks more interesting for kite surfing than paddle surfing.
The middle of the month, around August 15th, we see a slight bump in swell height to 4ft, but it’s coming with a risk of thunderstorms and a moderate cross-onshore wind, so the quality is still poor. The water temperature is about average for this time of year, nothing unusual to report.
The entire 16-day window has no good surf on offer. Every single session is rated as poor surf conditions. It’s a blank run, and for this area, that’s a fairly normal stretch of weather. Forecasts can change, but for now, there’s nothing to paddle out for.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Fri night. Warm (max 29°C on Fri night, min 28°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 29°C on Mon night, min 28°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | ||||||||||||||
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 8 | ESE 5 | E 8 | E 4 | ESE 4 | E 8 | ESE 4 | ESE 4 | E 4 | ESE 4 | ESE 4 | E 4 | E 7 | SE 4 | SE 4 | SE 5 | E 7 | SE 3 | ESE 3 |
Wave Graph  | |||||||||||||||||||
 kJ | 68 | 22 | 21 | 27 | 21 | 10 | 34 | 26 | 5 | 22 | 11 | 4 | 4 | 5 | 5 | 7 | 1 | 3 | 4 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | on | cross-on | on | on | cross-on | on | on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 4:13AM0.74m | 5:20PM0.79m | 5:24AM0.77m | 6:23PM0.84m | 6:30AM0.81m | 7:21PM0.88m | 7:31AM0.87m | 8:13PM0.92m | 8:26AM0.91m | 9:01PM0.95m | 9:18AM0.93m | 9:47PM0.95m | |||||||
Low Tide | 10:15PM0.17m | 10:44AM-0.02m | 11:25PM0.14m | 11:51AM-0.05m | 00:30AM0.10m | 12:53PM-0.08m | 1:28AM0.04m | 1:50PM-0.11m | 2:21AM-0.01m | 2:43PM-0.12m | 3:11AM-0.05m | 3:32PM-0.11m | 3:58AM-0.07m | ||||||
 | |  |  | | | | | | | | | | | | | | | | |
 | — | 6:50 | — | — | 6:50 | — | — | 6:50 | — | — | 6:50 | — | — | 6:50 | — | — | 6:52 | — | — |
 | 8:01 | — | 8:01 | — | — | 8:00 | — | — | 8:00 | — | — | 7:59 | — | — | 7:58 | — | — | 7:58 | — |
mm | 6 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 29 | 28 | 29 | 29 | 29 | 29 | 29 | 29 |
Feels °C | 32 | 32 | 31 | 31 | 30 | 31 | 31 | 32 | 31 | 31 | 31 | 31 | 30 | 32 | 32 | 32 | 32 | 31 | 31 |
Swell 1 Height (m) Direction Period (s) | NE 9 | E 8 | SSE 5 | NE 9 | E 8 | SSE 4 | NE 8 | E 7 | SSE 5 | NE 8 | E 7 | SSE 5 | SSE 6 | E 7 | E 7 | E 7 | SSE 4 | E 7 | E 7 |
| kJ | 28 | 22 | 7 | 12 | 10 | 8 | 3 | 4 | 15 | 3 | 3 | 9 | 6 | 3 | 4 | 4 | 1 | 1 | 1 |
Swell 2 Height (m) Direction Period (s) | NNE 5 | NE 9 | E 8 | E 8 | NE 9 | E 8 | — | NE 8 | E 7 | NE 8 | NE 9 | E 6 | E 7 | NE 8 | NE 8 | NE 8 | E 3 | NE 8 | NE 9 |
| kJ | 2 | 13 | 21 | 5 | 3 | 10 | — | 3 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 1 | 3 | 3 |
Swell 3 Height (m) Direction Period (s) | NNE 5 | NNE 5 | NE 9 | — | — | NE 8 | — | — | NE 8 | — | — | NE 8 | NE 8 | — | N 9 | — | E 7 | — | — |
| kJ | 2 | 3 | 12 | — | — | 3 | — | — | 3 | — | — | 3 | 3 | — | 1 | — | 1 | — | — |
Wind waves Height (m) Direction Period (s) | E 8 | ESE 5 | E 5 | E 4 | ESE 4 | E 4 | ESE 4 | ESE 4 | E 4 | ESE 4 | ESE 4 | E 4 | E 3 | SE 4 | SE 4 | SE 5 | — | SE 3 | ESE 3 |
| kJ | 68 | 22 | 7 | 27 | 21 | 10 | 34 | 26 | 5 | 22 | 11 | 4 | 4 | 5 | 5 | 7 | — | 2 | 4 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 925 | 272 | 731 | 272 | 338 | 1634 | 326 | 448 | 338 | 233 | 841 | 1634 | 895 | 941 | 1634 | 841 | 915 | 1560 | 692 |
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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