About River Island Marina
38.91186° N, 90.49404° W Boat/Rv services St. Charles, MO The River Island Marina offers a family friendly environment in an open and natural setting with covered slips that look across the channel into our private, wooded island. We have excellent boat launch ramps, plenty of parking, 24-hour restroom access, and a great environment.
Facilities
Electricity
Water
ToiletsCOORDINATES
38.91205 N, -90.49376 E
Port Information
Telephone
Berth Sizes
< 10m
Depth at MLW
2 - 3m
Manoeuvrability
Fair
Channel Marking
Fair
Port of Entry
No
Overseas Visitor Berths
No
Dock Type
Floating
Style Side To
Yes
Tidal Flow
Negligible
Active Winter
Yes
Weather Forecast
Sun
5AM - 9AM
17 May 2026
S 6 knots increasing to 8 knots. Gusts up to 20 knots.
17 to 22°C
UV Index: 0 - Low
Cloudy
Sun
9AM - 1PM
17 May 2026
- S 9 knots increasing to 12 knots. Gusts up to 19 knots.
- Increasing from 21 to 27°C
- UV Index: 8 - Very High
- Partly cloudy
Sun
1PM - 5PM
17 May 2026
- S 12–14 knots. Gusts up to 22 knots.
- 28 to 30°C
- UV Index: 8 - Very High
- Mostly fine