Get the appFishing index · Illinois
Chicago, Illinois sits at Lake Michigan and Chicago River, where local anglers mainly chase chinook salmon, coho salmon, smallmouth bass. Chicago's shoreline and harbors stack with coho and Chinook in spring and fall as lake temps cross their comfort band, and the river's warmwater reach holds smallmouth through the summer.
LureScore index · 2026-10-29
The score combines air temperature, pressure level and stability, wind, rain, season and a short-range trend trigger. It is a timing aid — not a fish finder.
7-day outlook
| Day | Index | Temp | Wind | Pressure | Sky |
|---|---|---|---|---|---|
| Today 2026-10-29 | 64 Fair | 68° / 49°F | 11 mph | 30.09 inHg | Overcast |
| Tomorrow 2026-10-30 | 62 Fair | 56° / 49°F | 12 mph | 30.33 inHg | Light drizzle |
| Saturday 2026-10-31 | 64 Fair | 60° / 52°F | 12 mph | 30.33 inHg | Light drizzle |
| Sunday 2026-11-01 | 54 Fair | 58° / 56°F | 7 mph | 30.24 inHg | Drizzle |
| Monday 2026-11-02 | 60 Fair | 59° / 56°F | 9 mph | 30.06 inHg | Light rain |
| Tuesday 2026-11-03 | 47 Fair | 66° / 58°F | 11 mph | 29.94 inHg | Light drizzle |
| Wednesday 2026-11-04 | 50 Fair | 63° / 59°F | 9 mph | 29.8 inHg | Light drizzle |
Daily highs/lows in °F, max wind in mph, mean sea-level pressure in inHg. Scores are computed per local forecast day.
Estimated water temperature · 2026-10-29
13.7 °C, most likely between 10.7 and 16.7 °C (about 51–62 °F). A modelled estimate for the water around Chicago on 2026-10-29, not a gauge reading.
Built from the last 7 days of daily mean air temperature (weighted toward recent days), a seasonal phase term, and coefficients fitted against 55 USGS gauges across 171,799 daily records; leave-one-station-out error is 1.96 °C. Large reservoir releases, spring-fed reaches, deep pools and tidal water can sit well outside this range. Water temperature tells you how actively fish are likely to feed — it does not tell you where they are. How this estimate works →
Model baseline_v1.0 · coefficients usgs_v1_20261022 (55 stations, fitted 2026-10-22)
Weather data by Open-Meteo.com (CC BY 4.0). Index scores and water-temperature estimates are our own derivation from that data.
Chicago's shoreline and harbors stack with coho and Chinook in spring and fall as lake temps cross their comfort band, and the river's warmwater reach holds smallmouth through the summer. The table above recomputes the index for each of the next seven days from that day's forecast, so you can time an outing to the strongest window instead of fishing the calendar.
Autumn brings cooling water and aggressive feeding ahead of winter — often the most consistent index readings of the year.
Windows are scored on the same model as the daily index. Sunrise and sunset edges are built into the schedule; the strongest mornings usually follow a stable or improving pressure trend.
The waters around Chicago include Lake Michigan and Chicago River. Chicago's shoreline and harbors stack with coho and Chinook in spring and fall as lake temps cross their comfort band, and the river's warmwater reach holds smallmouth through the summer. Start with public access points on these systems, check local regs, and let the daily index above guide timing.
The usual targets are Chinook salmon, Coho salmon and Smallmouth bass in and around Chicago. Seasonal timing shifts the bite — the forecast table on this page is computed for the same weather signals that matter for these species.
Yes — a Illinois state fishing license is required for anglers 16 and older (saltwater and freshwater endorsements may differ). Buy one through the Illinois state wildlife or natural-resources agency before you fish.
The index recommends the strongest windows printed under today's score — typically the low-light morning and evening windows. Sunrise and sunset edges are almost always worth more casts than midday, especially in the warmer months.
The LureScore index is an informational planning signal based on weather, not a guarantee of fish activity or a catch. Always follow local regulations.