Devonport Rivermouth Surf Break

Lat Long: 41.16° S 146.36° E

Devonport Rivermouth Surf Forecast and Surf Report

Issued: 3 am 19 Aug 2026 (local time)

Forecast update in  hr  min

Today's Devonport Rivermouth sea temperature is
12.8° C
0.5° 

Devonport Rivermouth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Devonport Rivermouth surf forecast from 18 Aug 2026:

  • Best quality surf: Thursday 20 Aug, 10PM (local time) - 4ft (1.2m), 6s period, NW swell with cross-offshore winds.
  • Most powerful swell: Monday 24 Aug, 4PM (local time) - 6ft (1.8m), 7s period, NNW swell with 288 kJ wave energy.
  • Next surfable swell (1★+): Thursday 20 Aug, 10PM (local time) - 4ft (1.2m), 6s period with NW swell.

Best Forecast Surf Conditions for Devonport Rivermouth this week:

The surf forecast for Devonport Rivermouth over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 10PM. The primary swell is predicted to be 1.2m and 6s period with a secondary swell of 0.9m and 6s. Another secondary swell of 0.3m and 11s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Devonport Rivermouth in the next 16 days are 1.8m 7s and forecast to arrive on Monday (Aug 24) at 4PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Wednesday (Aug 26) at 1AM.

Wave TypeTime (AEST) & Date Wave Height & Period
Next good surf (1 star+)10PM (Thu 20th Aug)4ft (1.2m) 6s
Best Surf10PM (Thu 20th Aug)4ft (1.2m) 6s
Most Powerful 4PM (Mon 24th Aug)6ft (1.8m) 7s

Table - best surf conditions forecast for Devonport Rivermouth over the next 16 days.


The Lowdown

G’day, Rusty here. Let’s be straight with you—this stretch of coastline is looking pretty sad for the next couple of weeks. The first real surf worth paddling out for doesn’t even show up until Thursday the 3rd of September, so we’re looking at a solid gap of quiet, tiny conditions. The run-up to that is all small, wonky, and barely breaking, with most days offering nothing but ankle-biters and cross-chop. The water’s sitting at 55° with a normal temp for this time of year, so no surprises there.

Before that one day that shows a pulse, it’s all flat and forgettable. The end of August into the first days of September have some long-period energy rolling through, but there’s just no size to back it up. You’ll see the swell periods stretching out to 18 or 19 seconds on the 31st, but the height is only around 0.3ft—so honestly, don’t bother. The one tiny flicker happens on the 28th of August, with a clean 2ft from the NW and light offshore wind, but it’s still only a “1” score in my book. Not worth the wetsuit.

Now, the 3rd of September Thursday morning is the only thing that’s going to get the heart rate up. Devonport Rivermouth (a point/river setup) will see a bump of 8ft swell from the NW with an 8-second period. That’s a short, punchy period which could be a bit jumbly, but the energy levels are massive—1668 in the combined energy, which is strong to very strong. The wind is light from the E, so it’s cross-shore but light, with just some small ripples. The afternoon drops to 6ft from the NW with a glassy surface, and that’s your window for the cleanest waves of the whole period. I’d call Thursday the standout, hands down.

That’s the only day I’d really point you to. The rest of the window is a write-off. The spot is inconsistent anyway, and this run proves it. Still, with that one solid pulse showing up, I wouldn’t say it’s dead here forever—just pick your day and go when it’s on.

Rusty, out.

Short Range Forecast

Heavy rain (total 31mm), heaviest during Wed afternoon. Very mild (max 13°C on Wed night, min 9°C on Thu night). Wind will be generally light.

Days 4-6 Weather Summary

Light rain (total 5mm), mostly falling on Sun night. Very mild (max 14°C on Sat morning, min 6°C on Mon night). Mainly fresh winds.

Wednesday
19
Thursday
20
Friday
21
Saturday
22
Sunday
23
Monday
24
Tuesday
25
AM
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
1
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)
0.9
NE
7
1.2
NNE
6
1.7
NNW
7
1.5
NNW
7
1.3
NW
6
0.9
NW
5
1
NW
6
1.4
NW
6
0.3
NW
17
1.2
WNW
6
0.4
NW
15
0.4
NW
15
0.9
NW
5
1
NW
5
0.3
NW
16
1.5
NNW
5
1.8
NNW
7
1.4
NNW
7
0.7
NNW
6
0.5
NW
5
0.3
NW
13
Wave Graph
Metric surfscale
Energy kJ
73
87
277
199
132
41
60
157
46
90
60
77
39
43
38
125
288
186
30
13
25
Wind (km/h)
15
ENE
25
NNE
25
NNW
25
WNW
20
WNW
10
W
20
W
20
W
20
W
25
W
20
W
15
W
20
WNW
25
WNW
20
NW
25
NW
25
WNW
10
SSW
10
SE
5
ENE
15
SE
Wind State
cross-on
on
cross-on
cross
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross
cross-on
cross
cross
off
cross-off
glassy
cross-off
High Tide
4:41PM3.20m
5:17AM3.08m
5:18PM3.18m
5:58AM3.04m
5:52PM3.15m
6:36AM2.99m
6:27PM3.10m
7:14AM2.94m
7:02PM3.04m
7:53AM2.90m
7:40PM2.97m
8:35AM2.85m
8:22PM2.90m
Low Tide
10:37AM0.91m
11:02PM0.64m
11:15AM1.01m
11:40PM0.67m
11:51AM1.11m
00:16AM0.71m
12:26PM1.19m
00:51AM0.76m
1:01PM1.27m
1:27AM0.81m
1:38PM1.33m
2:05AM0.86m
2:20PM1.37m
2:47AM0.91m
light rain
heavy rain
rain showers
rain showers
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
part cloud
part cloud
rain showers
rain showers
light rain
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:00
6:58
6:56
6:56
6:54
6:52
6:50
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
5:36
5:37
5:37
5:38
5:39
5:40
5:42
 mm
3
17
10
1
2
2
1
Temp °C
12
12
13
13
13
11
13
13
11
14
14
11
13
13
12
13
13
9
13
13
8
Feels °C
9
8
9
9
8
8
8
9
5
9
9
7
8
8
9
8
8
6
9
10
3
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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 Devonport Rivermouth Surf forecast

The above surf forecast table for Devonport Rivermouth provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Devonport Rivermouth can be found by selecting the local surf guide option on the grey menu. Our Devonport Rivermouth 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 (Devonport Rivermouth) 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 Devonport Rivermouth 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.

Devonport Rivermouth is 5 km (3 miles) from Devonport. If you plan a holiday in North Coast of Tasmania, look for hotels and other accommodation in Devonport. Devonport has rooms for a wide range of budgets as well as car hire and transport links.

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