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SS Hesper (Wreck)

The SS Hesper is a shipwreck located approximately 40ft-50ft away from the breakwater wall of the Silver Bay marina. The wreck consists of two sections separated by about 30 feet, with scattered wreckage surrounding it. The rudder can be found just south of the underwater mooring block. This historic wreck sank on May 4, 1905.

When diving at the SS Hesper, divers should note that there is relatively little wildlife in the area. The most common marine life found here are gobies, with the possibility of encountering lake trout or whitefish. It is important to be cautious while diving to avoid kicking up silt and reducing visibility.

With a visibility of approximately 7m, the SS Hesper offers a suitable diving experience for both beginner and advanced divers. The maximum depth of the dive site is 13m.

Located in Silver Bay, Minnesota, the SS Hesper is easily accessible from the Silver Bay Marina on Bayside Park Road. The shipwreck is a significant historical site, attracting divers from all over to explore its remnants.

For more information about the SS Hesper and its historical background, you can visit the following sources:
- MNHS Shipwrecks
- Wikipedia

Specifications of the SS Hesper:
- Namesake: Hesperus, the evening star
- Builder: Ship Owners Dry Dock Company, Cleveland, Ohio
- Launched: June 28, 1890
- Sank: May 4, 1905
- Displacement: 1540 long tons (1560 metric tons)
- Length: 250 ft (76.2 m)
- Beam: 41.6 ft (12.7 m)
- Draught: 20.2 ft (6.2 m)
- Propulsion: Vertical triple-expansion reciprocating steam engine, 825 horsepower
- Complement: Captain E.H. Heaton and a crew of 15

Diving Conditions Score for SS Hesper (Wreck)

6.9
Above Average

Decent conditions, proceed with caution.
The score is based on a calculation of the current weather and sea conditions.

Dive Site Overview for SS Hesper (Wreck)

Depth

13m

Visibility

7m

Experience Level

beginner
advanced

Weather Conditions for SS Hesper (Wreck)

Wave Height

0.02m

Wind Speed

5.8 m/s

Water Temp

18°C

Visibility

24.6km

Cloud Cover

0%

Wave Period

2.1s

Air Temperature

18.6°C

Precipitation

0 mm

Detailed 7-Day Diving Forecast for SS Hesper (Wreck)
Alpha

Dive Score Chart for SS Hesper (Wreck)

Best time to dive: 14:00 with score 8.569098412698413/10. Water conditions: Waves 0.08m, Wind 3.2 m/s.Best night dive time: 1:00 with score 8.01/10.

Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.

Sunrise at SS Hesper (Wreck): 06:00
Sunset at SS Hesper (Wreck): 18:00

Optimal diving conditions at SS Hesper (Wreck) are affected by daylight hours. Sunrise occurs at 06:00 and sunset at 18:00, which impacts visibility and water temperature for scuba diving and snorkeling.

🌞
Best Overall
14:00

Score: 8.6/10
Waves: 0.08m (2.1s), Wind: 3.2 m/s

🌞
Safest Overall
12:00

Score: 8.5/10
Waves: 0.14m (2.05s), Wind: 2.2 m/s

🌙
Best Night
1:00

Score: 8.0/10
Waves: 0.16m, Wind: 2.9 m/s

Seasonal Analysis for SS Hesper (Wreck)
Alpha

Historical patterns and best seasons for diving at SS Hesper (Wreck)

The dive score combines all factors to rate overall diving conditions throughout the year. Higher scores indicate better diving conditions.

Monthly Dive Score Analysis - Seasonal Diving Conditions

Higher values indicate better diving conditions

Seasonal DiveScore Chart

This chart displays monthly diveScore data throughout the year, showing seasonal patterns. The data is presented as a bar chart with an overlaid line graph.Dive scores range from 1 to 10, with 10 being optimal conditions.

Higher values indicate better diving conditions

Best Season for SS Hesper (Wreck)

Winter

Avg. Score: 8.3/10

Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.

Best Months for SS Hesper (Wreck)

January
Score: 8.4
December
Score: 8.3
February
Score: 8.2

Ideal Conditions for SS Hesper (Wreck)

Water Temp

Thermometer Emoji

17.9°C / 64.2°F

July

Visibility

Telescope Emoji

14.9m / 48.9ft

December

Wave Height

Wave Emoji

1.1m / 3.6ft

February

Wave Period

Wave Emoji

8.0s

January

Seasonal Insights for SS Hesper (Wreck)

SS Hesper (Wreck) shows typical northern hemisphere patterns with July being the warmest month (17.9°C) and January the coldest (-16.5°C). The calmest conditions typically occur in February with average wave heights of 1.1m and wave periods of 8.0s. The most comfortable wave conditions are in February with a low wave steepness ratio, creating gentler swells. January offers the longest wave periods (8.0s), creating more comfortable and predictable conditions for boat entries and exits. Ocean currents are slowest in January (0.5m/s) and strongest in January (0.5m/s). March is usually the driest month with 0.0mm of precipitation. For beginners, the best time to visit would be during February to April, when ocean conditions are calmer with long-period waves and currents are typically weaker. Experienced divers might enjoy the challenges and potentially better visibility during the shoulder seasons, with moderate currents that can improve marine life encounters.

Scoring Legend:
9-10 (Excellent)
7-8 (Good)
5-6 (Average)
3-4 (Poor)
1-2 (Dangerous)

Last updated: 1 min. ago - Jun 21, 2026

Note: This dive site is not a verified dive site. Please dive with caution. This dive site might have incorrect information by the community.

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