21st Street (Miami) Surf Break

Lat Long: 25.80° N 80.13° W

21st Street (Miami) Surf Forecast and Surf Report

Issued: 1 pm 10 Sep 2026 (local time)

Forecast update in  hr  min

Today's 21st Street (Miami) sea temperature is
30.7°C
1.6° 

21st Street (Miami) surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


21st Street (Miami) surf forecast from 11 Sep 2026:

  • Most powerful swell: Wednesday 16 Sep, 2AM (local time) - 3.5ft (1.0m), 5s period, E swell with 44 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 1.0m 5s and forecast to arrive on Wednesday (Sep 16) at 2AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 4s period and expected on Saturday (Sep 12) at 11PM.

Wave TypeTime (EDT) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2AM (Wed 16th Sep)3.5ft (1.0m) 5s

Table - best surf conditions forecast for 21st Street (Miami) over the next 16 days.


The Lowdown

Alright, mate, Rusty here. Let’s be real with you. The next couple weeks are looking pretty grim for a proper surf. We’ve got a long stretch of poor surf conditions that’s going to test your patience. For the first week and a half, you’re better off finding something else to do. There’s a real gap of surf on offer from now until around the 23rd. It’s a long, flat spell, so don’t get your hopes up just yet.

The action, if you can call it that, doesn’t even start looking semi-decent until Wednesday the 23rd. That’s still over a week away, and while the ocean might start to show a little life, those forecasts are a long way from being locked in. That’s the one to keep an eye on, but don’t book the day off work just yet.

Now, for the one and only spot in the mix: 21st Street (Miami). The water temp is at 87°F, which is a touch warmer than normal for this time of year. It’s going to feel like a bath, so you don’t need a spring suit.

That Wednesday the 23rd window is the only thing that grabs me. The swell finally pushes past 3ft, with a 4ft NNE groundswell rolling in with a 9-second period. The energy in the water is building, too. We’re seeing combined energy between 322 and 365, moving from weak into that moderate range. It’s not a bomb, but it's something. The wind is set to be cross-offshore from the SW and WSW, which will clean it up nicely. It’s still only marginal surf, so the wave quality is questionable, but it’s the best we’ve got on the board. It’s a start.

If that Wednesday doesn’t fire, Thursday the 24th morning might be your next best shot. Same story, a 4ft NNE swell, energy around 202, but the wind drops to almost nothing and goes glassy. That will make the water look like a lake. The surf will still be average, but glassy conditions can make anything feel a little more special.

Other than that, we're looking at plenty of choppy, cross-onshore junk with onshores and short-period, weak swells. The setup is just not there. Later on, there's a big wind spike around the 21st and 22nd, with near-gale force winds blowing. That’s more for the kitesurfers than anyone with a paddle. I’d be looking at the horizon on that 23rd and hoping the models firm up.

This is a blank run that’s more normal for this area. It tends not to stay poor for long, so keep the faith. Forecasts can change. Until next time, keep the wax warm.

Rusty.

Short Range Forecast

Moderate rain (total 19mm), heaviest on Sat morning. Warm (max 30°C on Thu afternoon, min 29°C on Thu night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 4mm), mostly falling on Tue afternoon. Warm (max 29°C on Sun afternoon, min 28°C on Tue morning). Mainly fresh winds.

Thu
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.6
NNE
7
0.5
NE
7
0.4
NE
6
0.5
SE
4
0.6
ESE
3
0.7
ESE
4
0.7
ESE
4
0.6
ESE
4
0.7
SE
4
0.2
E
9
0.2
E
9
0.2
E
9
0.2
E
8
0.6
E
4
0.8
E
4
0.7
E
4
1
E
5
0.8
ENE
5
0.6
E
4
0.7
E
4
Wave Graph
Metric surfscale
Energy kJ
37
24
11
8
7
13
15
12
18
6
6
6
6
10
24
17
44
29
15
17
Wind (km/h)
15
SE
20
ESE
15
ESE
15
ESE
25
ESE
20
ESE
20
SE
15
SE
15
SE
15
ESE
20
ESE
15
ESE
20
E
25
E
20
E
25
ENE
25
E
25
ENE
25
NE
15
E
Wind State
cross-on
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
on
on
on
on
on
on
cross-on
on
cross-on
cross-on
on
High Tide
8:39PM1.00m
9:02AM1.02m
9:21PM1.00m
9:47AM1.02m
10:00PM0.98m
10:29AM1.00m
10:38PM0.95m
11:11AM0.96m
11:16PM0.91m
11:54AM0.91m
11:55PM0.85m
12:38PM0.86m
00:37AM0.80m
Low Tide
2:28PM0.01m
2:50AM0.01m
3:13PM0.02m
3:32AM-0.01m
3:55PM0.05m
4:13AM0.00m
4:36PM0.10m
4:52AM0.03m
5:16PM0.16m
5:32AM0.08m
5:58PM0.22m
6:13AM0.13m
6:42PM0.28m
thunderstorm
clear
thunderstorm
part cloud
rain showers
thunderstorm
part cloud
thunderstorm
clear
clear
clear
clear
clear
clear
clear
thunderstorm
thunderstorm
clear
part cloud
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:03
7:03
7:05
7:05
7:05
7:05
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:30
7:29
7:28
7:27
7:25
7:24
7:22
 mm
1
3
3
4
8
2
2
1
Temp °C
30
29
29
29
29
29
30
30
29
29
29
29
29
29
29
29
29
29
29
29
Feels °C
33
32
32
32
32
32
32
32
32
32
32
31
32
30
30
31
29
29
30
29
  • Map Icons:
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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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