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Surf Forecasts

Union Bay surfForecast / Lake Superior / USA

information circle12 Day Weather and Surf, issued 1 pm Sunday 15 Jun 2025 EDT
Forecast update in hr  min  s Forecast update imminent
Union Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Union Bay sea temperature is
7.2° C
 (Which is 2.5°C warmer than normal for this time of year)

Best Forecast Surf Conditions for Union Bay this week:

The most powerful waves expected at Union Bay in the next 12 days are 0.4m 3s and forecast to arrive on Monday (Jun 16) at 11PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Tuesday (Jun 17) at 2PM.

Wave TypeTime (EDT) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful11PM (Mon 16th Jun)1.5ft (0.4m) 3s

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

Hourly12 Days
Lake Superior Surf
Print Surf Table
Updates in  hr  min  s Forecast update imminent 
Sun
15
Monday
16
Tuesday
17
Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
Tuesday
24
Wednesday
25
Thursday
26
Fri
27
PMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.2
ENE
0.2
E
——
0.5
SE
0.5
WSW
0.6
WSW
0.3
WSW
———
0.4
NE
0.4
ENE
0.2
ESE
0.3
SSE
0.4
SE
0.5
SSE
0.4
S
——————————————————
Period(s) (?)33--4443---3333344------------------
Wave
Graph
(?)Metric surfscale
Energy (?)110000000002310000000000000000000000
Wind
(km/h)
10
ENE
5
SW
5
S
5
S
30
SSW
25
W
15
SW
15
WSW
5
NW
10
NE
5
SSW
15
N
10
NE
5
SSW
5
ESE
15
NE
15
SSE
10
ESE
5
N
5
NW
15
SSW
20
SW
25
SSW
25
SSW
25
SW
20
W
10
W
5
NE
10
SW
10
W
5
WNW
10
ENE
10
ENE
10
NE
5
ENE
0
N
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		glassoffglassoffcrosscross-
off		cross-
off		cross-
on		cross-
on		glassoncross-
on		glassglasscross-
on		cross-
off		cross-
off		onglassoffcross-
off		cross-
off		cross-
off		cross-
off		cross-
off		crosscross-
on		cross-
off		crossglasscrosscross-
on		cross-
on		cross-
on		glass
High Tide
/ height (m)
n/a
n/a
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n/a
n/a
Low Tide
/ height (m)
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
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n/a
Sun
15
Monday
16
Tuesday
17
Wednesday
18
Thursday
19
Friday
20
Saturday
21
Sunday
22
Monday
23
Tuesday
24
Wednesday
25
Thursday
26
Fri
27
Sunrise--6:03--6:03--6:03--6:03--6:03--6:03--6:03--6:03--6:03--6:05--6:05--6:05
Sunset9:53--9:53--9:54--9:54--9:54--9:55--9:55--9:55--9:55--9:55--9:55--9:55--
part cloudpart cloudcloudthunderstorm thunderstorm part cloudpart cloudclearpart cloudpart cloudcloudcloudpart cloudclearclearclearpart cloudrain showerspart cloudpart cloudpart cloudclearclearclearclearthunderstorm part cloudpart cloudclearpart cloudcloudpart cloudpart cloudpart cloudpart cloudpart cloud
Rain (mm)
---523------------3-------3----------
Temp. °C1516182120142121171716991015161517211925302826262114161817192114131417
Feels °C (?)131619222210191916171665813131217222027302725242013161717212312111418

Short Range Forecast: Heavy rain (total 28mm), heaviest during Mon night. Warm (max 21°C on Mon afternoon, min 13°C on Sun night). Winds increasing (calm on Sun night, fresh winds from the SSW by Mon night).

Days 3-6 Weather Summary Light rain (total 3mm), mostly falling on Sat morning. Very mild (max 17°C on Wed afternoon, min 9°C on Thu morning). Wind will be generally light.

Days 6-9 Weather Summary Light rain (total 3mm), mostly falling on Mon night. Warm (max 30°C on Sun afternoon, min 13°C on Mon night). Wind will be generally light.

Long Range Forecast: Mostly dry. Warm (max 21°C on Wed night, min 12°C on Wed night). Wind will be generally light.

  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
<span class="translation_missing" title="translation missing: en.leaflet.map_placeholder_alt">Map Placeholder Alt</span>
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Union Bay surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

View detailed surf forecast for Union Bay at:
surf-forecast.com

Information about the Union Bay Surf forecast

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

Union Bay is 173 km (107 miles) from the city of Marquette. If you plan a vacation in Lake Superior, look for hotels and other accommodation in Marquette. Marquette has rooms for a wide range of budgets as well as car hire and transport links.

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