Anchorage off Island 521
Mississippi River
Past nights from AIS in Aug 2024 and Oct 2025
Where boats stayed: 38.939° N, 90.481° W
2nights
1boat
Nights by wind direction
| From | Nights | Boats | Nights in 20 kt+ | Windiest night (area) |
|---|---|---|---|---|
| NE | 1 | 1–2 | – | 5.8 ktgusts 7.6 kt |
| E | 1 | 1–2 | – | 4.9 ktgusts 7.8 kt |
Nearby anchorages
- Anchorage near Portage Des Sioux, Portage Island1 night
- Anchorage in Mississippi River, Bradley Island1 night
- Anchorage off Mortland Island, Illinois River3 nights
- Anchorage near Alton, Mississippi River1 night
- Anchorage near Parkers Landing, Mississippi River1 night
- Anchorage near Hardin, Illinois River31 nights
- Anchorage off Diamond Island, Titus2 nights
AIS shows only boats that carry it and that a receiver hears, so no boats on AIS never means an anchorage is empty or unsuitable. Boats that live here (at their own berth or mooring, or a week or more in one place) are left out, and boats in marinas and at piers are counted apart from the anchorage's nights. Not for navigation.