Surf Forecasts:
21st Street (Miami) surf forecast from 25 Jul 2026:
- Most powerful swell: Friday 31 Jul, 8PM (local time) - 2.5ft (0.7m), 4s period, S swell with 14 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 4s and forecast to arrive on Friday (Jul 31) at 8PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Friday (Jul 31) at 11PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Fri 31st Jul) | 2.5ft (0.7m) 4s |
Table - best surf conditions forecast for 21st Street (Miami) over the next 16 days.
The Lowdown
Alright folks, it’s Rusty here. Let’s have a look at what’s on offer for the next couple of weeks, and I’ll be straight with you – it’s a tough stretch for us in the Miami area. The whole 16-day window is looking pretty flat, with barely a ripple to get excited about.
We’re talking about 21st Street (Miami) here, and honestly, there’s not a single day I’d tell you to grab your board and head out. The water temp is sitting at 86°F which is about average for this time of year, so at least it’s warm if you fancy a float.
The first real chance of anything comes right at the end of the run. On Saturday afternoon, August 9th, we see a tiny pulse of 3 ft swell from the ESE with a period of just 4 seconds. That’s weak, short-period windswell, and the combined energy is only 48 (weak). The wind is onshore from the ESE at 6 mph, so it’s not going to be clean. It’s a nothing burger, really.
Before that, the whole stretch from July 25th right through to the morning of August 9th is near enough a write-off. We’ve got days of 0.7 ft to 2 ft junk, mostly from the east with periods of 3 to 8 seconds. The combined energy values are all below 100 (weak), which tells you there’s just no punch. The winds are a mix of cross-off and cross-on, but it doesn’t matter because there’s nothing to ride. The break is inconsistent at the best of times, and with this forecast, it’s not even worth a look.
The only slight glimmer is that little bump on the 9th, but with a 4-second period and onshore wind, it’s going to be messy and weak. It’s not for beginners, but it’s also not for anyone who wants a decent wave. I’d say this blank run is pretty normal for our area when the summer patterns set in. We’ll have to wait for the next front or a tropical rumble to get things moving again.
Rusty.
Short Range ForecastHeavy rain (total 39mm), heaviest during Mon morning. Warm (max 32°C on Sun afternoon, min 28°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 11mm), heaviest on Tue afternoon. Warm (max 34°C on Thu afternoon, min 28°C on Tue night). Mainly fresh winds. | |||||||||||||||||||
Sat 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | ||||||||||||||
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) | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | S 3 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | N 6 | NE 10 | S 3 | E 9 |
Wave Graph  | ||||||||||||||||||||
 kJ | 10 | 10 | 10 | 5 | 5 | 5 | 8 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 4 | 3 | 4 | 7 | 2 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross-off | off | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | off | cross-off | cross-off | off |
High Tide | 6:40PM0.70m | 6:31AM0.64m | 7:24PM0.73m | 7:18AM0.66m | 8:05PM0.76m | 8:02AM0.69m | 8:43PM0.78m | 8:44AM0.72m | 9:19PM0.80m | 9:24AM0.75m | 9:54PM0.80m | 10:04AM0.77m | 10:29PM0.80m | |||||||
Low Tide | 00:44AM0.19m | 12:51PM0.03m | 1:30AM0.16m | 1:35PM0.01m | 2:11AM0.13m | 2:17PM-0.01m | 2:49AM0.10m | 2:57PM-0.02m | 3:26AM0.07m | 3:36PM-0.02m | 4:02AM0.05m | 4:14PM-0.01m | 4:38AM0.03m | |||||||
 |  |  | | | | | |  | | | | |  | | |  |  | | | |
 | — | — | 6:43 | — | — | 6:43 | — | — | 6:43 | — | — | 6:45 | — | — | 6:45 | — | — | 6:46 | — | — |
 | 8:09 | — | — | 8:09 | — | — | 8:08 | — | — | 8:08 | — | — | 8:07 | — | — | 8:07 | — | — | 8:07 | — |
mm | 1 | 7 | 1 | 4 | 10 | 6 | 1 | 9 | — | 7 | 4 | — | — | — | — | — | — | — | 1 | — |
Temp °C | 30 | 30 | 30 | 32 | 31 | 28 | 30 | 29 | 30 | 31 | 29 | 30 | 32 | 31 | 29 | 34 | 31 | 29 | 30 | 30 |
Feels °C | 32 | 32 | 33 | 34 | 33 | 33 | 31 | 32 | 32 | 31 | 28 | 30 | 32 | 30 | 29 | 32 | 29 | 31 | 33 | 31 |
Swell 1 Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 8 | S 3 | E 8 | E 8 | SW 3 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | S 4 | E 7 | E 7 | S 4 |
| kJ | 10 | 10 | 10 | 5 | 1 | 5 | 5 | 3 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 1 | 1 | 2 |
Swell 2 Height (m) Direction Period (s) | NE 8 | NE 8 | S 3 | NE 8 | E 8 | NE 8 | NE 8 | E 8 | NE 6 | NE 6 | NE 6 | NE 6 | NE 9 | NE 6 | NE 9 | NE 9 | N 6 | N 5 | E 10 | E 7 |
| kJ | 3 | 2 | 1 | 3 | 5 | 3 | 3 | 5 | 2 | 2 | 1 | 1 | 3 | 2 | 3 | 3 | 3 | 1 | 2 | 1 |
Swell 3 Height (m) Direction Period (s) | NE 4 | — | NE 8 | — | NE 8 | — | — | NE 8 | — | NE 8 | NE 9 | NE 9 | NE 5 | NE 9 | N 6 | N 6 | E 7 | NE 10 | NE 10 | E 9 |
| kJ | 1 | — | 3 | — | 3 | — | — | 3 | — | 3 | 3 | 3 | 1 | 3 | 1 | 1 | 1 | 4 | 4 | 2 |
Wind waves Height (m) Direction Period (s) | SE 3 | SSE 3 | WSW 2 | S 3 | WSW 2 | — | S 3 | WNW 2 | — | SSW 3 | SW 4 | SW 3 | SSW 4 | SW 3 | SW 2 | S 4 | W 3 | — | S 3 | SW 3 |
| kJ | 3 | 3 | 1 | 3 | 1 | — | 8 | 1 | — | 3 | 5 | 1 | 10 | 4 | 1 | 9 | 1 | — | 7 | 3 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 353 | 234 | 234 | 324 | 369 | 353 | 353 | 359 | 955 | 353 | 353 | 353 | 327 | 448 | 899 | 1480 | 1043 | 327 | 327 | 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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