Water level1: 0.9 m above chart datum.
Wind at NSC2: WNW at 3.9 kn, gusting to 6.

EC Current3: Mainly sunny, 9°C. Wind: NNW at 4 kn. Pressure: 101.7 kPa, rising. Relative humidity: 47%. Visibility: 13 nm.
EC Today3: Sunny. Wind becoming west 11 kn this afternoon. High 20. UV index 7 or high.

Note: All external links open in a new window or tab.

NSC's Weather Station

Local Conditions & Wind Forecasts


  • BYC's "Lake Cam" — Real-time view of Lac Deschênes, from Britannia Yacht Club

Weather Forecasts

Water Levels

Radar & Satellite Images


1 The water level is calculated as the difference between Britannia4 station's 57.9 m datum and the latest value in the Environment Canada Weather Office's Data File for Britannia4, updated every hour (Apr-Oct) and 4 hours (Nov-Mar).
Note to racers: The BYC gates must remain in place until the water level drops below ~59.0m, or less than 1.1m above datum.

2 Wind data is collected every 5 minutes by the NSC-owned Davis Vantage Pro2 Weather Station, mounted on the lighthouse at the harbour entrance. Note that the wind at NSC is likely to differ from that elsewhere on the lake and at the airport.

3 The current and forecast values at the Ottawa Airport are extracted every 5 minutes from the Ottawa (Kanata - Orléans) City Page. Wind speeds are converted to knots (kn), and distances to nautical miles (nm).

4 As noted in this post, the Britannia water level and flow metering station is actually located at NSC!

ISO Abbreviations: kn stands for knot(s), where 1 kn = 1.85 km/h, and nm stands for nautical mile(s).

Disclaimer: NSC does not warrant the quality, accuracy, or completeness of any data made accessible through this page. The above information and links are provided on an "AS IS" basis without warranty or condition of any nature.

Page updated: 2022-05-06.

********************** NOTE: This page must be edited as "the Boss". **********************
Update log
06 May: DS: commented out CVGR link as it now show "page not found".
29 Nov: HM: moved note about Britannia station being located at NSC, for better visibility.
11 Nov: DS: added note about Britannia station located at NSC.
02 Nov: HM: Deleted link to BYC Sailflow charts, as redundant.
02 Nov: HM: Added link to Removed new and updated tags.
30 Oct: DS: Updated Sailflow link with new NSC station data.
28 Oct: DS: maee the word "disclaimer" bold.
24 Oct: DS: Added BYC and CVGR conditions links.
15 Oct: DS: removed note about no new data.
07 Sep: DS: removed (new) from Canadian Weather Radar, reworded "When the wind..." sentence.
25 Aug: DS: added "or elsewhere on the lake" to note #2.
20 Aug: DS: replaced Satellite Images and Animation.
19 Aug: DS: added note about "no current data" display.
24 Jul: DS: removed conversion to knots part in note about wind data.
31 May: DS: changed water level update from 2 to 1 hour.
29 May: DS: Modified note #2 to include WX station location.
10 May: DS: Changed lightning map to focus on Ontario instead of the default, Canada.
27 Apr: DS: updated lightning URL.
07 Apr: DS: minor text changes to WX Station text. Local Conditions reordered alphabetically.
Moved lake cam view to own section in preparation for NSC webcam. Replaced retired
Local and Ontario Radar with Canadian Weather Radar.
04 Apr: DS: Added current wind from Weather Station in green box. Removed soon to be retired meteogram.
17 Feb: DS: Fixed various ul problems. Removed weather cycler commented out.
10 Feb: DS: Tweaked WX text.
03 Feb: DS: Changed WX Station link text to match page title.
29 Jan: HM: Added link to NSC's Weather Station page.
21 Jan: DS: updated the weather station announcement.
27 Dec: DS: Updated EC link.
21 Oct: HM: Added link to Updated link with lat/long for NSC. Changed link to BYC's Lake cam to point to full-size display, and added link to BYC's Weather page. (Previous link did not display well on phone.) Commented out the link to the Weather Cycler. Removed link to Marine Weather - no longer valid. Removed link to "Weather @ BYC", as that just pointed to Sail Flow. Added "Look for a new weather station coming soon." Changed heading "Current Local Conditions" to "Local Conditions & Wind Forecasts". Changed heading "Current Weather and Forecasts" to simply "Weather Forecasts". Added heading "Water Levels", and moved links accordingly. Moved Wind Guru and Wind Finder under "Local Conditions & Wind Forecasts". Changed Wind Finder location from airport to NSC. Changed first link under Water Levels from "" to "". Deleted commented reference to rbr-week.csv. Added "external" to statement "All external links open in a new window or tab."
DS: Undocumented edits: 20 October 2020; 10 May 2020; 3 May 2020
Oct 14: DS: added 10-days meteograms.
Apr 27: DS: removed link to Wind and Weather Data, and disabled display of wind in green box.
Mar 12: DS: replace weather add-on PHP snippet with

Water level1: 0.9 m above chart datum.
Wind at NSC2: WNW at 3.9 kn, gusting to 6.

EC Current3: Mainly sunny, 9°C. Wind: NNW at 4 kn. Pressure: 101.7 kPa, rising. Relative humidity: 47%. Visibility: 13 nm.
EC Today3: Sunny. Wind becoming west 11 kn this afternoon. High 20. UV index 7 or high.

Jul 27: DS: added BYC weather and wind predictions.
Jun 10: DS: changed "no data available" to "no current data" in bottom note section.
Apr 26: DS: changed water level text for 4- and 2-hours schedules.
19 Oct: DS: Removed Intellicast 10-day and Wind forecast, and Radar links as they now redirect to a useless US site.
24 Jul: DS: Updated disclaimer.
14 Jun: DS: updated Weather Cyclers.
06 May: DS: Updated BYC webcam URL.
23 Apr: DS: Simplified water level expanation.
18 Mar: DS: Shortened the bottom information messages.
12 Jan: HM: Updated link for
18 Nov: changed WC radar URLs for Ottawa and Ontario.
15 Jul: DS: shortened the text at the bottom of page
19 Apr: DS: added VentuSky link.
10 Mar: DS: added title tags in links of bottom page descriptions.
04 Aug: DS: replaced 'sect', 'dagger' and 'ddager' symbols with numerals.
28 Jul: DS: made the 'sect' and 'dagger' symbols superscripts.
08 Jun: DS: added lightning actity in ontario.
05 Jun: DS: added Ottawa North Forecast, extracted from xml file.
03 Jun: DS: added Airport wind using The included top box is generated by script /cgi-bin/buildWeatherAddOns.php, executed by CRON every 10 minutes. Added the disclaimer at bottom of page.

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