Golf Weather Score
Illinois

Onwentsia Club

Live golf weather forecast and playability analysis for Onwentsia Club in Illinois. Today's G-Score: 65/100Decent but challenging due to breezy. Pack accordingly.

Temp73°F
CondClear
Wind7 mph
By MinSu Kim·Course IntelligenceUpdated May 12, 2026

7-Day Forecast

Live Conditions

May 16 (Sat)

G-Score™
65
Temperature

79°F

Rain

Wind Speed

12 mph

Performance

Distance Impact

Temp Impact 1.4% CARRY
Wind Adj.± 1 CLUB(S)
Shop Waterproof Gear
Tactical Hole Explorer
Interactive Strategy
Select Target Hole
Mapping System
Scanning Topography...
Hole Insight

Hole 1

PAR 5|499 YDS|HCP 11

Tour Caddie Briefing

Awaiting official topography data to formulate strategy. [Live Intel: 12mph wind. Adjust your club selection by 1 clubs.]

Pro Shop Pick
Shop Rangefinders
Elevation Factor
... ft

Standard air density. Focus solely on wind and temp adjustments.

Difficulty Analysis
USGA Course Rating™
Course Rating72.8
Slope Rating134
Tough Course

Hardest Hole

Hole 8
Par 4 | 426 yds

"The #1 handicap hole. Play conservatively and aim for a bogey to protect your scorecard."

Scoring Opp

Hole 15
Par 4 | 344 yds

"The #18 handicap hole. This is your best chance to attack the pin and grab a birdie."

Official Distances
Onwentsia Club
Hole
1
2
3
4
5
6
7
8
9
OUT
10
11
12
13
14
15
16
17
18
INTOTAL
PAR5454344433422534434444329471
Black499399520418172367411426210342254519145043419234437632144132946716
Blue478388487401159363397414188327551417043042517633136130042031276402
Blue/White478388487385159363367371188318651417039539117633136130036230006186

Travel & Play Guide

Planning a golf trip to play Onwentsia Club? Whether you are a scratch golfer or a mid-handicapper looking to break 80, navigating this course requires a solid strategy and the right gear. Be sure to check the local weather forecasts above, adapt your club selections to the current wind and elevation, and book your accommodations early to secure the best rates near the course.

Onwentsia Club: Course Intelligence

Onwentsia Club opened in 1895 on a piece of Lake Forest, Illinois land north of Chicago — making it one of the earliest country clubs founded in the Midwest, contemporaneous with Glen View Club a few miles south and the Chicago Golf Club farther west in Wheaton. The original routing was a Frederick Law Olmsted Jr. landscape-design project with golf-hole layout by club founders, and the course has been redesigned multiple times since — most significantly by Donald Ross in the 1910s and 1920s. Onwentsia hosted the 1906 U.S. Open (Alex Smith won at +6, in conditions that produced a championship scoring record at the time).

The course plays around 6,900 yards par 71 from the back markers, with bent fairways and a slope in the upper 130s. The yardage is short by modern championship standards, but the routing's mature tree canopy — the property has been a golf course continuously since 1895, and the trees have grown to championship-narrowing dimensions — gives the corridors a tighter defense than the back-tee yardage suggests. Onwentsia has not hosted modern major-rotation events since 1906, but the club's institutional history through American country-club golf is part of why the routing remains in architectural-survey discussion.

Onwentsia is private and access is members and accompanied guests only. The membership is regional Chicago North Shore business and professional families with multi-generation ties through the late-1800s founding era. The hospitality model is traditional country club, and the club has stayed largely outside the destination-private trend that has reshaped many Chicago-area clubs.

Chicago North Shore climate gives Onwentsia a playing season of April through October. The course closes through Chicago winter and reopens when the soil thaws. The mature oak canopy through the property gives the routing significant character distinct from the more open Lake Forest courses, and the autumn color through October is part of the property's seasonal signature.

Related Reading

Before you tee off at Onwentsia Club

MinSu Kim

Founder & Golf Data Analyst

MinSu is a data analyst and golfer with 10+ years on the course. He built Golf Weather Score to answer one question: is today a good day to play? He combines weather data, course intelligence, and the proprietary G-Score algorithm to help golfers make smarter decisions.

Every Friday Morning

When Onwentsia Club plays best next weekend.

Friday 6am ET: peak G-Score windows for Onwentsia Club, wind direction by hour, and one gear call. Three minutes to read, save you the round.

One email a week. Unsubscribe in one click.

Daily Insight

The Caddie's Oracle

Draw your luck before the tee off