Today on Grandfather
· Tomorrow & the week: Lake Report or Premium →Best fishing times
All fishTimes by species available in Premium
Wind & weather
National Weather ServiceWhat Grandfather is best for
DNR data
WalleyePresent4.5
MuskyPresent3.9
BluegillPanfish, present3.9
PerchPanfish, present3.9
CrappiePanfish, present3.9
LargemouthPresent3.9
SmallmouthPresent3.9
Northern pikePresent3.9How we rate
Start from how common the DNR says the fish is (abundant 7.5, common 6, present 3.5). Add 1 if the DNR stocked it in the last 5 years, 0.6 for walleye in two-story or complex lakes, and up to 0.9 for lake size. The DNR counts bluegill, perch and crappie together as panfish, so they share a score.
Depth map
None publishedThe DNR has no depth map online for Grandfather.
Not for navigation. Old survey; depths and weed lines change.
Rules on this lake
DNR · checked 2026-10-08| Walleye | 15" min · keep none 20–24" · 1 over 24" · 3 a dayOpen All Year | Open |
| Musky | 40" min · 1 a dayMay 2, 2026 to December 31, 2026 on open water | Open |
| Northern pike | No size limit · 5 a dayOpen All Year | Open |
| Bass | 14" min · 5 a dayOpen All Year | Open |
| Panfish | No size limit · 25 a dayOpen All Year | Open |
| Sturgeon | No fishing | Closed |
Launches & access
1 public- Grandfather Flowage -- AccessDirections
Before you go
DNRThis is health advice about eating fish, from the DNR. It is not how many you can catch or keep. Catch limits are in Rules.
Eat any amount Bluegill and Sunfish, Bullheads, Crappies, Inland Trout, Yellow Perch
Up to 1 meal a week Bass, Catfish, Pike, Walleye, All Other Species and Sizes
Up to 1 meal a month Muskies
Statewide advice; no lake-specific advisory. Stricter for women who may get pregnant and children under 15. DNR detailsRusty Crayfish
Drain all water, remove plants and animals, and never move live fish or bait to another lake.Ice on Grandfather
Reports & estimateReviews
No reviews yetNear Grandfather
Local dealsLocal bait shops, resorts and supper clubs can put a coupon here and on the printed sheet, free for a year. Add your business
Grandfather board
Catches & reportsLakes near Grandfather
Within 25 miles| Lake | Miles | Acres | Max depth |
|---|---|---|---|
| Tug LakeLincoln | 4.2 | 151 | 21 ft |
| Grandmother FlowageLincoln | 5.1 | 119 | 22 ft |
| Spirit River FlowageLincoln | 8.7 | 1,239 | 22 ft |
| Lake PesobicLincoln | 8.9 | 156 | 11 ft |
| Road LakeLincoln | 9.3 | 82 | 35 ft |
| Skanawan LakeLincoln | 9.6 | 69 | 5 ft |
| Silver LakeLincoln | 10 | 82 | 39 ft |
| Merrill FlowageLincoln | 10.1 | 164 | 11 ft |
Grandfather questions
How deep is Grandfather Flowage?
Grandfather Flowage is 32 feet at its deepest. It covers 184 acres.
What fish are in Grandfather Flowage?
The Wisconsin DNR lists musky (present), panfish (present), largemouth bass (present), smallmouth bass (present), northern pike (present) and walleye (present).
Where is the boat launch on Grandfather Flowage?
There is 1 public launch: Grandfather Flowage -- Access.
Do I need a trout stamp to fish Grandfather Flowage?
A Wisconsin fishing license covers this lake. No trout or Great Lakes stamp needed here.
What is the walleye limit on Grandfather Flowage?
15" min · keep none 20–24" · 1 over 24" · 3 a day. Season: Open All Year.
Fish it longer
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Sources: Wisconsin DNR (lake facts, species, rules, stocking, consumption advice, survey map), National Weather Service (forecast). Sun and moon computed for the lake's location. Best times are a model of light and moon, not a promise. Checked 2026-10-08.