Surf Forecasts:
21st Street (Miami) surf forecast from 16 Jul 2026:
- Most powerful swell: Tuesday 21 Jul, 2PM (local time) - 2.5ft (0.8m), 4s period, SE swell with 22 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 0.8m 4s and forecast to arrive on Tuesday (Jul 21) at 2PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 5s period and expected on Wednesday (Jul 22) at 5PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Tue 21st Jul) | 2.5ft (0.8m) 4s |
Table - best surf conditions forecast for 21st Street (Miami) over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about what’s going on in your local waters.
Right now, the outlook is flat and frustrating. Honestly, there’s nothing worth paddling out for through this whole 16-day stretch. You’re looking at a long gap with no real surf to speak of. From Thursday, July 16, right through to the end of the month, the waves are small, weak, and messy. The swell height mostly hovers around 1ft to 2.5ft, with short periods of 4 to 9 seconds—barely enough to push a foamie along. The combined wave energy is tiny, reading just 8 to 29 (zone of low energy). It’s a sad picture.
The only break on the cards is 21st Street (Miami). Even then, it’s inconsistent and rarely gets any proper shape. The water temperature is 86.9°, a touch warmer than normal for this time of year, so at least it’s warm if you want a float, but not for surfing.
Let’s break it down day by day.
Thursday July 16 morning sees glassy conditions and a tiny 1ft NE swell with a 7-second period, but combined energy is only 12—just not enough. Afternoon gets a bit breezy, cross-onshore, making it choppy on top of almost no wave. Friday July 17 morning has a cleaner feel with cross-offshore wind, but the swell is 0.7ft and period 6 seconds. Honestly, it’s flat.
Saturday July 18 has a risk of thunderstorms in the morning, with a pathetic 0.3ft NE swell. Shredding? Not a chance. Sunday July 19 morning offers clear skies but cross-shore wind and 2.3ft SSE swell with only 4-second period—basically bumpy bump. It just keeps looking the same: tiny swells, short periods, and cross-onshore winds messing up whatever little bump might form.
Monday July 20 through to Friday July 31, it’s the same story. Swell stays between 0.7ft and 2.6ft, periods mostly 4-5 seconds, combined energy never breaks above 29. Wind is nearly always cross-onshore or cross-shore with some chop. There’s no standout day, no clean glassy window with real swell.
The break is a fairly exposed beach setup, so you’d think it would catch something, but this run is just blank. Given how inconsistent this spot is, a period like this isn’t unusual. It’s more of a kite-surfing breeze than a paddle-surfing scene right now.
Don’t hold your breath. Forecasts can change, but for now, leave the board at home.
Short Range ForecastLight rain (total 7mm), mostly falling on Fri night. Warm (max 30°C on Thu afternoon, min 28°C on Fri morning). Winds increasing (calm on Thu morning, fresh winds from the SSE by Fri afternoon). | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Mon night. Warm (max 29°C on Sun morning, min 28°C on Sun morning). Wind will be generally light. | ||||||||||||||||||||
Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | |||||||||||||||
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) | NE 7 | NNE 7 | NNE 6 | NNE 6 | SSE 4 | S 4 | SSE 3 | SSE 4 | SSE 4 | SSE 4 | SSE 5 | SSE 5 | E 4 | SSE 4 | SSE 4 | ESE 4 | SE 4 | SE 4 | ESE 5 | E 4 | ESE 4 |
Wave Graph  | |||||||||||||||||||||
 kJ | 7 | 4 | 4 | 4 | 16 | 6 | 3 | 13 | 7 | 15 | 14 | 8 | 3 | 8 | 3 | 13 | 18 | 9 | 17 | 6 | 19 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross-off | cross-off | cross-on | cross-off | cross-on | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 10:24AM0.87m | 10:58PM0.90m | 11:18AM0.85m | 11:45PM0.86m | 12:11PM0.81m | 00:33AM0.82m | 1:05PM0.77m | 1:20AM0.76m | 2:00PM0.73m | 2:09AM0.71m | 2:58PM0.69m | 3:00AM0.67m | 3:57PM0.67m | 3:53AM0.64m | |||||||
Low Tide | 4:38PM-0.16m | 5:10AM-0.09m | 5:29PM-0.10m | 6:00AM-0.07m | 6:20PM-0.04m | 6:50AM-0.05m | 7:12PM0.03m | 7:40AM-0.02m | 8:05PM0.10m | 8:32AM0.02m | 9:00PM0.15m | 9:26AM0.04m | 9:58PM0.19m | ||||||||
 | |  |  |  |  |  |  |  | | | | | | | | | | | | | |
 | 6:37 | — | — | 6:39 | — | — | 6:39 | — | — | 6:39 | — | — | 6:39 | — | — | 6:41 | — | — | 6:41 | — | — |
 | — | 8:14 | — | — | 8:13 | — | — | 8:13 | — | — | 8:13 | — | — | 8:12 | — | — | 8:12 | — | — | 8:10 | — |
mm | — | — | — | — | 1 | 5 | 1 | — | — | — | — | — | — | — | 2 | — | — | — | — | — | — |
Temp °C | 29 | 30 | 30 | 29 | 30 | 29 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 29 | 29 |
Feels °C | 33 | 32 | 31 | 31 | 31 | 29 | 31 | 30 | 31 | 31 | 30 | 29 | 32 | 30 | 30 | 30 | 30 | 29 | 31 | 30 | 30 |
Swell 1 Height (m) Direction Period (s) | NE 7 | NNE 7 | NNE 6 | NNE 6 | NE 6 | E 8 | E 8 | E 8 | E 4 | E 7 | E 7 | — | E 4 | E 7 | E 5 | E 8 | E 7 | E 7 | E 8 | SSE 5 | — |
| kJ | 7 | 4 | 4 | 4 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | — | 3 | 1 | 2 | 1 | 4 | 4 | 4 | 8 | — |
Swell 2 Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 8 | E 8 | NE 7 | NE 8 | NE 8 | E 8 | NE 9 | NE 9 | E 7 | E 7 | NE 8 | E 7 | N 8 | — | — | N 8 | E 7 | — |
| kJ | 5 | 1 | 1 | 1 | 1 | 2 | 2 | 3 | 1 | 3 | 3 | 1 | 1 | 3 | 1 | 1 | — | — | 1 | 4 | — |
Swell 3 Height (m) Direction Period (s) | SE 5 | — | — | NE 6 | N 8 | — | NE 9 | NE 9 | NE 7 | NE 9 | NE 9 | NE 8 | NE 8 | N 9 | N 8 | — | — | — | — | E 9 | — |
| kJ | 1 | — | — | 1 | 1 | — | 3 | 3 | 2 | 3 | 3 | 3 | 3 | 1 | 1 | — | — | — | — | 1 | — |
Wind waves Height (m) Direction Period (s) | — | SE 3 | SSE 3 | S 3 | SSE 4 | S 4 | SSE 3 | SSE 4 | SSE 4 | SSE 4 | SSE 5 | SSE 5 | SSE 3 | SSE 4 | SSE 4 | ESE 4 | SE 4 | SE 4 | ESE 5 | E 4 | ESE 4 |
| kJ | — | 3 | 3 | 2 | 16 | 6 | 3 | 13 | 7 | 15 | 14 | 8 | 2 | 8 | 3 | 13 | 18 | 9 | 17 | 6 | 19 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 369 | 325 | 1149 | 943 | 1634 | 145 | 915 | 1512 | 731 | 814 | 407 | 185 | 728 | 377 | 394 | 448 | 314 | 377 | 314 | 360 | 236 |
Best forecast wave conditions in South Florida | |||||||||||||||||||||
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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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