Surf Forecasts:
21st Street (Miami) surf forecast from 10 Aug 2026:
- Most powerful swell: Sunday 16 Aug, 2AM (local time) - 4ft (1.2m), 5s period, SE swell with 79 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 1.2m 5s and forecast to arrive on Sunday (Aug 16) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 5s period and expected on Saturday (Aug 15) at 2PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Sun 16th Aug) | 4ft (1.2m) 5s |
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. The next couple of weeks are looking pretty grim for a surf. We’ve got a long stretch of small, junky, wind-blown waves ahead, so if you’re jonesing for a wave, you might wanna find another hobby for a bit.
The whole 16-day window is a flat spell. We’re looking at a run of tiny, short-period leftovers that are getting chopped up by onshore breezes. The energy is just pathetic, with readings mostly in the single digits and teens – weak stuff, barely a ripple. The water temp is sitting at 86°, which is about normal for this time of year, so at least you won’t be cold while you’re sitting there staring at nothing.
The first week, from Monday the 10th through the weekend, is a total write-off. Swell is dribbling in under 3 feet, with periods of 3 to 7 seconds, and it’s all coming from the east or southeast – straight into the wind. Every session is marked as “poor surf conditions.” It’s the kind of week where you’d be better off with a boogie board or just having a swim.
We finally see a tiny pulse of long-period energy around Tuesday the 18th, with a 15-second period, but the swell height is a pathetic 0.7 feet. The combined energy is still weak, only getting into the 20s and 30s. There’s a morning of glassy conditions on the 18th, which is a tease, but there’s nothing to ride. That’s the story for the rest of the run – a few longer period pulses, but they are so small they’ll barely show up.
The whole 21st Street (Miami) stretch is inconsistent, and it's not breaking properly. The best we can say is that the first week of this forecast is a total bust, and the second week is only slightly better in terms of period, but not in size. This is a long, dry spell. If you’re set on getting wet, you might be more interested in how the wind is blowing for a kite session, because the surf is a no-go.
Keep the board in the car, but don’t hold your breath. Forecasts can change, so we’ll keep an eye on it, but for now, this is a blank run.
Rusty out.
Short Range ForecastMostly dry. Warm (max 30°C on Mon afternoon, min 29°C on Mon morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Sat morning. Warm (max 30°C on Thu afternoon, min 28°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | |||||||||||||||
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) | SE 4 | E 4 | ESE 4 | E 4 | E 7 | SE 6 | E 7 | SE 3 | NE 8 | NE 8 | SE 3 | ESE 3 | ESE 4 | E 4 | SE 4 | SE 5 | E 5 | SE 5 | E 5 | E 5 | ESE 4 |
Wave Graph  | |||||||||||||||||||||
 kJ | 19 | 9 | 16 | 7 | 3 | 15 | 3 | 5 | 3 | 3 | 2 | 7 | 12 | 5 | 26 | 51 | 19 | 79 | 16 | 10 | 16 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | cross-on | on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on |
High Tide | 7:21PM0.88m | 7:31AM0.87m | 8:13PM0.92m | 8:26AM0.91m | 9:01PM0.95m | 9:18AM0.93m | 9:47PM0.95m | 10:08AM0.94m | 10:31PM0.94m | 10:55AM0.92m | 11:14PM0.90m | 11:42AM0.88m | 11:55PM0.85m | ||||||||
Low Tide | 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 | 4:19PM-0.08m | 4:43AM-0.07m | 5:05PM-0.02m | 5:27AM-0.05m | 5:49PM0.04m | ||||||||
 |  |  | | | | | |  |  | | | | |  |  | | | | | | |
 | 6:50 | — | — | 6:50 | — | — | 6:50 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — |
 | — | 8:00 | — | — | 7:59 | — | — | 7:58 | — | — | 7:58 | — | — | 7:57 | — | — | 7:55 | — | — | 7:54 | — |
mm | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | 4 | 4 | — | — | — | — | — |
Temp °C | 29 | 30 | 29 | 29 | 29 | 29 | 29 | 30 | 30 | 29 | 30 | 29 | 29 | 30 | 29 | 29 | 30 | 29 | 29 | 30 | 29 |
Feels °C | 30 | 32 | 31 | 31 | 31 | 31 | 33 | 33 | 32 | 34 | 32 | 32 | 32 | 32 | 30 | 29 | 32 | 30 | 30 | 32 | 31 |
Swell 1 Height (m) Direction Period (s) | E 7 | SSE 5 | NE 8 | SSE 5 | SSE 5 | NE 8 | E 7 | NE 9 | E 7 | E 7 | E 7 | NE 9 | E 7 | SE 4 | E 7 | NE 12 | SSE 6 | NE 11 | SSE 5 | SSE 6 | E 8 |
| kJ | 4 | 16 | 3 | 4 | 5 | 3 | 3 | 3 | 1 | 1 | 1 | 3 | 1 | 4 | 1 | 6 | 33 | 5 | 22 | 18 | 5 |
Swell 2 Height (m) Direction Period (s) | NE 8 | NE 8 | NE 8 | E 7 | E 7 | N 8 | NE 8 | S 4 | NE 8 | NE 8 | N 8 | E 9 | NE 9 | E 7 | NE 9 | N 9 | NE 12 | — | E 8 | E 8 | NE 10 |
| kJ | 3 | 3 | 3 | 4 | 3 | 1 | 3 | 1 | 3 | 3 | 1 | 2 | 3 | 1 | 3 | 2 | 5 | — | 5 | 5 | 4 |
Swell 3 Height (m) Direction Period (s) | — | NE 8 | — | NE 9 | NE 8 | — | N 9 | — | — | N 8 | — | — | E 9 | NE 9 | N 13 | — | N 9 | — | NE 11 | NE 10 | NE 10 |
| kJ | — | 3 | — | 3 | 3 | — | 1 | — | — | 1 | — | — | 2 | 3 | 3 | — | 2 | — | 4 | 4 | 4 |
Wind waves Height (m) Direction Period (s) | SE 4 | E 4 | ESE 4 | E 4 | E 4 | SE 6 | SE 4 | SE 3 | SSE 4 | SSE 4 | SE 3 | ESE 3 | ESE 4 | E 4 | SE 4 | SE 5 | E 5 | SE 5 | E 5 | E 5 | ESE 4 |
| kJ | 19 | 9 | 16 | 7 | 2 | 15 | 2 | 5 | 2 | 1 | 2 | 7 | 12 | 5 | 26 | 51 | 19 | 79 | 16 | 10 | 16 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 232 | 1488 | 360 | 359 | 1634 | 1149 | 353 | 324 | 1167 | 841 | 1560 | 1149 | 915 | 1634 | 448 | 780 | 1634 | 234 | 234 | 448 | 253 |
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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