a58geek
Lake Travis
Austin, TX
Lake Travis
Average HO Temperature

LTTS
CRWN #241
Resource Links


For instant gratification view this 10 year average


Introduction

This page uses data gathered from various locations on the web to generate average water temperature information for Lake Travis, Austin, TX USA.

This information will likely be most useful to folks planning trips to the lake from distant locations.

How long this project is kept up with here is unknown.  It is a labor of curiosity, which could run out.

At the time this page was initially published there were no easily available resources for Lake Travis average water temperature records.  There were however, two locations for some archived temperature info.  Since we're dealing with averages, either of these test stations would do.  While the LTTS station provides more consistent data to work with, there was not enough history to build an average with, so for starters the CRWN data was used.

LTTS
The Lake Travis Test Station monitored by the ARL of UT Austin is an excellent resource for current climate and water information (including temperature and lake level).  The station is located about 465m East of the dam. (ref)

Included on the LTTS page is (up to) a 10 day Summary of Recent Measurements, which provides air and water temperature, as well as lake level info.  As more data is archived this will provide an excellent resource for averages.

Also included on this summary page is a continuously updated camera image of the lake... pretty nifty!

CRWN Station #241
The Colorado River Watch Network station #241 for Lake Travis at Arrowhead Point has a web page that archives test data.  The data times and dates are not as consistent as the LTTS site, but there was more of it available when the search for average Lake Travis water temperature began, so it was used to generate a 10 year average for immediate use.  The source temperature data is in C, and is converted to F for the calculations made here.

Color Codes
Used in the tables and charts on this page.

= Coldest HO Temperature recorded ** = Warmest HO Temperature recorded **
** (only the most recent instance is highlighted if there is a tie)
= 10 Year Average (of Available Data)

Please note that different locations and depths of the lake will record different temperatures.
YMMV



Lake Travis Test Station by UT

LTTS
HO Averages


Since there is no historical data for this test station easily available on the web, it will be a while before comprehensive average water temperature can be compiled.  For instant gratification see the 10 year average of the CRWN data below.

LTTS data archive calculation results will be recorded here (if kept up with).


LTTS - Lake Travis Average Water Temperature F
2009 Monthly
Average
1st 1/3 2nd 1/3 3rd 1/3
Jul x x x 85.1
Aug 85.84 85.18 85.92 86.48
Sep 82.72 84.87 82.42 80.88
Oct 76.22 78.9 76.65 73.38
Nov 69.28 71.13 69.58 67.12
Dec 61.12 63.45 61 57.9
Record Drought Year


LTTS - Lake Travis Average Water Temperature F
2010 Monthly
Average
1st 1/3 2nd 1/3 3rd 1/3
Jan 55.16 56.03 54.25 55.2
Feb 53.14 53.37 52.85 53.23
Mar 56.55 53.57 58.37 57.61
Apr 64.28 60.95 64.22 67.67
May 73.84 71.33 72.22 77.59
Jun 82.21 81.37 80.6 84.65
Jul 85.25 84.15 85.4 86.12
Aug 87.72 86.97 88.57 87.64
Sep 84.31 85.03 84.8 83.1
Oct 77.59 79.73 77.3 75.91
Nov 69.27 71.82 68.88 67.1
Dec 61.98 64.33 61.58 59.8
Record Hot August


LTTS - Lake Travis Average Water Temperature F
2011 Monthly
Average
1st 1/3 2nd 1/3 3rd 1/3
Jan 56.93 58.77 56.52 55.61
Feb 53.98 53.15 52.7 56.63
Mar 60.73 58.22 59.4 64.21
Apr 68.68 65.52 68.85 71.68
May 73.97 71.28 73.7 76.67
Jun 81.62 80.28 81.6 82.98
Jul 85.8 85.67 85.85 85.86
Aug 86.98 86.73 86.52 87.62
Sep
Oct
Nov
Dec
Record Hot Summer ... Record Hot August ... Record Drought Year




Lake Travis
Average Water Temperature
Collected from CRWN.lcra.org

Lake Travis at Arrowhead Point - site #241
note:
Temperature data at CRWN is recorded in C


Map

This Table is Displayed as F

(date)
(temp.)
rounded to nearest 10th... it's a conversion thing

* Occasionally one month is skipped, and there are 2 entries for an adjacent month...
in these cases the MM-DD are displayed to simplify the table.

This is (currently) the closest CRWN station to Hippie Hollow.

Chart Color Code Info


Date Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2000 23
60.8
23
62.6
22
64.4
18
71.6
26
79.7
30
85.1
26
86.2
25
86.9
10-2 *
79.7
27
75.2
22
64.4
x
2001 25
54.5
x 5
57.2
18
69.8
x x 25
86
x x x 7
71.6
18
62.6
2002 21
58.1
27
57.2
x 18
71.6
30
78.8
27
83.3
25
86
28
86
10-1 *
80.6
17
76.1
21
68
30
59
2003 x 23
53.6
x 22
66.2
22
76.1
28
85.1
28
85.1
27
86
10-1 *
78.8
31
74.3
x 8
63.5
2004 11
58.1
1
55.8
17
61.7
9
68
21
76.1
30
80.6
30
84.2
25
82.4
x 11
78.8
9
74.3
9
64.4
2005 11
59.9
10
55.4
11
60.8
x 9
69.8
x 6
86
3
86
8
84.2
5
82.4
6
73.4
12
62.6
2006 x 16
58.1
9
62.6
10
68
9
77
x 11
82.4
x 8
82.4
12
79.7
14
70.7
x
2007 9
58.1
x 10
62.6
x 10
73.4
x 12
84.2
10
87.8
10
86
11
82.4
12
73.4
x
2008 11
59
11
59
11
56.3
x 12
71.6
9
78.8
10
84.2
11
84.2
10
84.2
10
77
x 14
60.8
2009 9
60.8
10
59
x 18
63.5
12
75.2
18
82.4
17
86
x
x x 5
69.8
13
57.2
10 Yr.
Avg.
59 58 61 68 75 83 85 86 82 78 71 61
Date Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2010 19
54.5
13
51.8
X
15
64.4
21
77
28
86.9
29
86
x
6
82.4
x
x
x
x
x
x
2011 X
X
X
X
X
X
X
X
X
X
X
X
X
X
x
x
x
x
x
x
x
x
x
x

Notes on the CRWN "10yr. avg."
Rounded to nearest whole number, from available data.  This
10 year average is not entirely bulletproof... but it gives a good enough idea.  To be an ideal average the test data would need to be taken on the same day of each month (or better yet, every day), at the same time of day... and there would be no gaps in the data.

HTH


Resources and Links
For Data on This Page... Plus Other Water Info



Current LTTS Weather Readings
Excellent resource for Current Weather and Water Conditions at Lake Travis

LCRA Drought Information
Excellent synopsis of the current Central Texas Drought situation

Temperature Conversion
Fahrenheit to Celsius Converter



File Notes
  • travis-avg-h2o-crwn.ods
    • Use this spreadsheet as a continuing data record for:
      • Average Water Temperature Calculations
    • Contains data collected from the CRWN.lcra.org site #241 data page
      • This CRWN recording station is the closest one to Hippie Hollow.
    • Document Created with Open Office.
  • travis-avg-h2o-crwn.pdf ... (ref - .odt)... (ref - .txt)
    • Saved as a historical reference only.
    • Contains the first copy of the bulk h2o temp. data that was converted from C to F
    • PDF Document Created by exporting from an Open Office text document (.odt).
  • travis-data-avg-ltts.ods
    • Use this spreadsheet as a continuing data record for:
      • Average Water Temperature Calculations
      • Averages are for monthly 3rds, and the whole month
      • Whole month is calculated using all days (not just the 3rds)
    • Contains data collected from the UT LTTS, located just East of the dam.
    • Document Created with Open Office.
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