Fishing the Thousand Islands Area in the Spring
| Month | Avg. Air Temps °F (Hi/Lo) |
| March | 42° / 20° |
| April | 55° / 33° |
| May | 68° / 44° |
In the spring, the fishing is very good here in the river. The walleye and pike are found much shallower early in the year in the bays and along the shorelines. This is the easiest time of year for most anglers to put up good numbers of walleye and pike. The bass fishing picks up towards the end of May with tons of smallmouth bass and largemouth bass moving into the bays and along the shorelines as they get ready to spawn. Out on Lake Ontario, anglers do well early in the spring for trout, walleye and pike.
Fishing Thousand Islands Area in the Summer
| Month | Avg. Air Temps °F (Hi/Lo) |
| June | 77° / 52° |
| July | 82° / 58° |
| August | 80° / 56° |
In the summer, the bite stays good during June, July and August. The muskie and walleye get a little harder to located as the summer pattern sets in, but if you know how to locate the in deeper water, the fishing can still be very good. The bass fishing is outstanding and you can still find some bass shallow all summer, but many of the better quality smallmouth bass will be found in deeper water around the islands and open water structure. The pike go deeper too, but there are still plenty in the bays along the weed lines. Out on Lake Ontario, salmon fishing picks up in the summer, but the trout go out deeper in search of cooler water.
Fishing Thousand Islands Area in the Fall
| Month | Avg. Air Temps °F (Hi/Lo) |
| September | 71° / 48° |
| October | 59° / 38° |
| November | 46° / 30° |
The fall is a great time to fish this area as many fish will move back into the shallows in September. You will still find plenty of fish deep, but you can find smallmouth bass, largemouth bass, northern pike, walleye and muskie moving into the more obvious shallow water cover and structure. As water temperatures continue to fall into the low 50s, you will find a lot of fish moving back out into deeper water as they put on the feed bag before winter.
Fishing Thousand Islands Area in the Winter (Ice Fishing)
| Month | Avg. Air Temps °F (Hi/Lo) |
| December | 34° / 17° |
| January | 28° / 8° |
| February | 31° / 10° |
Ice fishing is popular on the St. Lawrence River in many of the bays. Anglers target walleye, pike, perch and other panfish through the ice all winter long.
