Surf Forecasts:
21st Street (Miami) surf forecast from 20 Jul 2026:
- Most powerful swell: Monday 20 Jul, 5PM (local time) - 3ft (0.9m), 5s period, SSE swell with 42 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 Monday (Jul 20) at 5PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 5s period and expected on Wednesday (Jul 22) at 8PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5PM (Mon 20th Jul) | 3ft (0.9m) 5s |
Table - best surf conditions forecast for 21st Street (Miami) over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let me level with you about the Miami stretch over the next couple of weeks. Lookin' at the charts, it's a tough beat. We're in for a long, flat spell with barely a ripple to get excited about.
The first bit of the forecast period, from Monday 20 July right through to roughly the end of the month, we've got a persistent run of poor surf conditions. The swell is tiny, mostly hanging around 1 ft to 3 ft, with short-period wind slop from the SSE and SE. The combined wave energy is weak, reading between 8 and 54 – that's nothin' to write home about. Winds are mostly cross or cross-on, chopping up what little bump there is. It's a classic summer flat spell, and 21st Street (Miami) is just not gettin' any love. The water temp is sitting around 87°F with a 2°F anomaly – that's a touch warmer than usual for this time of year, but it won't help the waves.
We're lookin' at a solid gap of days here with no real recommendations. The whole first week is a washout. Even when we get a few glimmers of cleaner conditions, like the Tuesday 28 July afternoon with a cross-off breeze and a clean face, the swell is still just 2 ft from the SSE. That's knee-high at best, and the combined energy is a paltry 27. It's just not enough.
We push into the start of August, and it's more of the same. Sunday 02 August morning looks glassy with a 3 mph SSW breeze, but the swell is a pathetic 0.7 ft from the east. The wave energy is a whisper at 11. It's a beautiful day for a paddle on a log, but not for surfing. The pattern holds through to the end of the forecast window on Tuesday 04 August, with tiny swell and mostly messy winds.
To be honest, there isn't a single standout session in this 16-day window. There's no surf to speak of, no real options to chase. For a beach break like 21st Street, a blank run like this is pretty normal for the summertime doldrums. The only real positive is that the wind does lay down a few times, offering a clean ocean surface – but you'd need a miracle to get a wave worth riding. Keep an eye on the longer-range forecasts; it tends not to stay this poor forever.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Wed morning. Warm (max 30°C on Mon morning, min 28°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Fri night. Warm (max 29°C on Thu morning, min 28°C on Thu morning). Wind will be generally light. | ||||||||||||||||||||
Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | |||||||||||||||
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) | SSE 5 | SSE 5 | SSE 5 | SE 4 | SE 5 | E 3 | SE 4 | SE 5 | E 4 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 7 | E 8 | E 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 30 | 42 | 15 | 29 | 23 | 5 | 22 | 28 | 9 | 5 | 5 | 6 | 10 | 10 | 10 | 14 | 10 | 10 | 4 | 5 | 10 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross | cross-off | cross | cross-off |
High Tide | 2:00PM0.73m | 2:09AM0.71m | 2:58PM0.69m | 3:00AM0.67m | 3:57PM0.67m | 3:53AM0.64m | 4:55PM0.67m | 4:47AM0.62m | 5:50PM0.68m | 5:41AM0.62m | 6:40PM0.70m | 6:31AM0.64m | 7:24PM0.73m | ||||||||
Low Tide | 8:05PM0.10m | 8:32AM0.02m | 9:00PM0.15m | 9:26AM0.04m | 9:58PM0.19m | 10:20AM0.05m | 10:58PM0.21m | 11:13AM0.06m | 11:54PM0.21m | 12:04PM0.05m | 00:44AM0.19m | 12:51PM0.03m | 1:30AM0.16m | ||||||||
 | |  | | |  |  | | | | | |  | | | | | | | |  | |
 | 6:39 | — | — | 6:41 | — | — | 6:41 | — | — | 6:41 | — | — | 6:41 | — | — | 6:43 | — | — | 6:43 | — | — |
 | — | 8:12 | — | — | 8:12 | — | — | 8:10 | — | — | 8:10 | — | — | 8:10 | — | — | 8:09 | — | — | 8:09 | — |
mm | — | — | — | — | — | 1 | 7 | — | — | — | — | — | 2 | — | 4 | 1 | — | 2 | — | 1 | 8 |
Temp °C | 30 | 30 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 30 | 29 |
Feels °C | 30 | 30 | 30 | 30 | 30 | 31 | 30 | 31 | 30 | 31 | 30 | 30 | 31 | 31 | 31 | 32 | 31 | 32 | 31 | 31 | 32 |
Swell 1 Height (m) Direction Period (s) | E 5 | ESE 5 | E 7 | E 8 | E 8 | SSE 5 | E 8 | E 8 | SSE 5 | SSE 4 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 4 | E 8 | E 8 |
| kJ | 2 | 9 | 1 | 1 | 4 | 7 | 4 | 5 | 8 | 3 | 5 | 5 | 10 | 10 | 10 | 10 | 10 | 10 | 3 | 4 | 10 |
Swell 2 Height (m) Direction Period (s) | E 7 | NE 8 | NE 8 | N 8 | N 8 | — | — | N 9 | E 8 | E 8 | SSE 4 | — | NE 9 | NE 9 | NE 9 | NE 8 | NE 8 | NE 8 | E 7 | NE 8 | NE 8 |
| kJ | 1 | 3 | 3 | 1 | 1 | — | — | 2 | 5 | 5 | 1 | — | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 3 | 3 |
Swell 3 Height (m) Direction Period (s) | NE 8 | — | N 8 | — | — | — | — | E 8 | N 10 | N 9 | N 9 | NE 9 | NE 9 | NE 9 | — | E 8 | NE 8 | — | NE 8 | NE 8 | — |
| kJ | 3 | — | 1 | — | — | — | — | 5 | 2 | 2 | 1 | 3 | 3 | 3 | — | 5 | 3 | — | 3 | 3 | — |
Wind waves Height (m) Direction Period (s) | SSE 5 | SSE 5 | SSE 5 | SE 4 | SE 5 | E 3 | SE 4 | SE 5 | E 4 | E 4 | E 4 | E 3 | E 4 | ESE 4 | ESE 3 | SE 4 | SE 4 | SSE 4 | SSE 4 | SE 3 | SSE 4 |
| kJ | 30 | 42 | 15 | 29 | 23 | 5 | 22 | 28 | 9 | 5 | 4 | 6 | 4 | 5 | 6 | 14 | 10 | 3 | 1 | 5 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 731 | 359 | 256 | 1330 | 1379 | 377 | 377 | 731 | 289 | 353 | 938 | 728 | 326 | 692 | 232 | 213 | 314 | 229 | 234 | 234 | 731 |
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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