Marion Bay surfForecast / TAS – East Coast / Australia

information circle12 Day Weather and Surf, issued 4 am Tuesday 16 Dec 2025 AEDT
Forecast update in hr  min  s Forecast update imminent
Marion Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Marion Bay sea temperature is
15.0° C
(Which is slightly warmer than usual)


Best Forecast Surf Conditions for Marion Bay this week:

The surf forecast for Marion Bay over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Dec 16) at 2PM. The primary swell is predicted to be 0.8m and 11s period with a secondary swell of 0.2m and 9s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Marion Bay in the next 12 days are 1.9m 7s and forecast to arrive on Saturday (Dec 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 1.4m 7s period and expected on Monday (Dec 22) at 5AM.

Wave TypeTime (AEDT) & Date Wave Height & Period
Next good surf (1 star+) 2PM (Tue 16th Dec)2.5ft (0.8m) 11s
Best Surf11PM (Sat 20th Dec)6ft (1.8m) 8s
Most Powerful 5PM (Sat 20th Dec)6ft (1.9m) 7s

Table - best surf conditions forecast for Marion Bay over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Mostly dry. Warm (max 22°C on Wed morning, min 12°C on Tue night). Wind will be generally light.

Days 3-6 Weather Summary Light rain (total 4mm), mostly falling on Sat morning. Very mild (max 18°C on Sat morning, min 11°C on Sun night). Winds decreasing (fresh winds from the NE on Fri night, calm by Sun morning).

Tuesday
16
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
1
0
1
1
0
0
0
0
0
0
0
0
1
1
2
2
1
0
0
0
1
Swell
Height Map
Wave Height (m) & direction (?)
0.9
SSE
0.7
S
0.6
S
0.5
S
0.4
SSE
0.5
NE
0.2
S
0.3
S
0.4
SSE
0.3
S
1.2
E
1.6
ENE
1.9
ENE
1.9
E
1.5
ENE
1.2
E
0.9
SSE
0.8
SE
0.9
S
1.1
SSE
0.7
SE
Period(s) (?)121111101061314141256778888778
Wave
Graph
(?)Metric surfscale
Energy kJ (?)23212182523318133661277318430739725916995678313255
Wind
(km/h)
20
WSW
10
ENE
10
NNW
0
WSW
10
ESE
10
WSW
5
SE
10
E
10
ESE
20
ENE
25
ENE
30
NE
5
NE
20
SSW
5
WSW
0
SSW
20
SW
25
SW
15
SW
15
WSW
5
SE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
cross-
on
cross-
off
glassoncross-
off
cross-
on
cross-
on
oncross-
on
cross-
on
cross-
on
cross-
on
crossglassglasscross-
off
cross-
off
cross-
off
cross-
off
glass
High Tide
/ height (m)
7:10PM
0.66
6:32AM
1.02
8:09PM
0.67
7:09AM
1.04
9:02PM
0.68
7:47AM
1.06
9:50PM
0.69
8:27AM
1.07
10:35PM
0.70
9:08AM
1.07
11:18PM
0.71
9:49AM
1.07
11:59PM
0.72
Low Tide
/ height (m)
1:12PM
0.31
11:48PM
0.49
1:55PM
0.26
12:29AM
0.52
2:36PM
0.21
1:13AM
0.54
3:17PM
0.18
1:57AM
0.56
3:58PM
0.16
2:40AM
0.56
4:39PM
0.14
3:24AM
0.57
5:18PM
0.14
4:10AM
0.57
Tuesday
16
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Sunrise5:24--5:24--5:24--5:24--5:24--5:24--5:26--
Sunset-8:43--8:43--8:44--8:45--8:45--8:45--8:45-
part cloud
clear
part cloud
clear
clear
part cloud
cloud
cloud
part cloud
cloud
cloud
cloud
rain showers
clear
part cloud
light rain
light rain
part cloud
part cloud
part cloud
part cloud
Rain (mm)
------------1--12----
Temp. °C172015222219161714131415181815141313171916
Feels °C (?)13171221191815161211101018171314127131513
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

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Information about the Marion Bay Surf forecast

The above surf forecast table for Marion Bay provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Marion Bay can be found by selecting the local surf guide option on the grey menu. Our Marion Bay 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 (Marion Bay) 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 Marion Bay 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.

Marion Bay is 39 km (24 miles) from Port Arthur. If you plan a holiday in East Coast of Tasmania, look for hotels and other accommodation in Port Arthur. Port Arthur has rooms for a wide range of budgets as well as car hire and transport links.

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