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
Wed
9AM - 1PM
18 February 2026
W 7–9 knots backing SW 7-9 knots.
18 to 20°C
UV Index: 3 - Moderate
Mostly fine
Wed
1PM - 5PM
18 February 2026
- SW 5–10 knots. Gusts up to 16 knots.
- 16 to 20°C
- UV Index: 0 - Low
- Mostly fine
Wed
5PM - 9PM
18 February 2026
- Light and variable.
- Decreasing from 17 to 12°C
- UV Index: 0 - Low
- Cloudy